A basic math question that eludes me.

justaguy1

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It is an unfortunate fact that I am quite far from adept at all things related to mathematics. It is for that reason that I could use your assistance concerning the following question:

According to this web page, http://www.mortgagecalculatorsplus....al-payment-each-year-change-your-mortgage.php if one were to have a mortgage of 200,000 at a 6.5 percent interest for a 30 year term, the owner of the home would pay $1264.00 on a monthly basis. If one additional payment of $1264.00 were to be made annually, the above source states that one would save nearly 56 thousand in interest, which in turn would reduce the overall amount paid on the loan by the same amount as a result, however, in order to see how they came to this conclusion I took the 1264 x 30, which equals 37,920, then I assumed one would have to factor in the compounded interest on that sum, which equates to about 9,000 whether I compound the 1264 payment annually or monthly (unless I am doing something incorrectly, which is highly likely); those two figures combined result in a total of about 46K in savings, not 56K.

I thought perhaps I had to factor in the interest that would have been paid on the savings that one would have to pay had they not submitted the extra payment each year, but I believe that interest was accounted for when I allotted a 6.5 interest rate on the 1264 payment over the course of a thirty year duration.

Suffice it to say my strengths reside very far outside of the realm of mathematics, so if anyone would be so kind as to explain how they arrived at a 56K savings for one extra annual payment of 1264 over the course of a thirty year duration I would be most appreciative.
 
Thank you for your response to my question. I had thought learning of the solution could be simplistically explained as though you treated the 1264 as an account gaining interest over a 30 year duration at 6.5 percent as you have explained in your closing and as I have stated in my initial question, however, by doing so I came to the amount of 37,920 in the sheer payments themselves 1264x 30= 37,920 and came to the conclusion that the interest on the 1264 payments amounts to about 9K which is how I came to the rough estimate of 46K (37K+9K=46K).

The way you answered my question showed that you were already very much cognizant of the fact that the loan would be reduced to a 24 year time period and how those payments played out in that duration, but lets say I didn't already know the loan would be reduced by 6 years and I simply chose to reach the answer of 56K as though I was treating the 1264 in the manner of it being located in an account and gaining compounded interest at 6.5 percent interest for a 30 year duration; how would that have been broken down mathematically?

I ask because although I intrinsically thought that approach would explain things as you are saving the 1264 x 30 and the value of it's compounded interest at 6.5, the methodology I chose to reach the end value of that scenario was flawed enough for me to reach a total of 46K as opposed to 56K as I've stated earlier.

Thank you in advance for your time.
 
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Denis,

It truly is apparent that you went out of your way to help me and I thank you for that. Your answer was incredibly thorough and though I am still working out the mechanics of this form of math since it is brand new to me, your answer provided a semblance of understanding where there was once none
 
I would be most appreciative if you would be kind enough to show me how the above formula would be addressed in basic mathematical terms.

I recall that in algebra, a bracket ([ ]) dictates what part of the equation must be addressed first, however, just what that order is I am not quite sure. If you would be so kind as to make me aware of the form of math found below as well, I would appreciate it. I believe it to be intrinsically algebraic, yet I am not even certain of that embarrassingly enough.

Again, please work out the problem in the order the equation must be addressed in basic math; for example: (200000 * 0.65/12 to the 120th power-1); As well as the order the math must be solved as I am curious how the bracket affects what part of the problem is solved first.
 
I haven't been feeling well lately as a sinus infection has been getting the better of me and haven't looked at what you have typed in detail as a result, but from a glance I can very much tell that you were kind enough to break things down in a dramatic fashion for someone as inept as myself in the realm of mathematics; for that I am very appreciative.

Thank you for investing the time to convey something that must have been quite tedious.
 
Denis,

Believe it or not, my math anxiety is such that I haven't attempted to resolve this problem and thoroughly examine what it is you have written until now. Thank you for breaking the problem down step-by-step as such an approach is a prerequisite if someone such as myself whom is unfamiliar with algebra will ever able to understand the methodology one must employ in order to decipher what part of the equation is approached first and in what order.

I have a request if you wouldn't mind, could you use the original numbers in the web page above and break down the problems again step-by-step; for example, if you could display the formulas broken down for this scenario: Original mortgage amount: $200,000
Interest rate: 6.5 percent
Term: 30 years
Monthly payment: $1264
Total interest paid on your loan: $255,088.98
How much you will really pay in full at the end of your term: $455,088.98

And, then this one: Original mortgage amount: $200,000
Interest rate: 6.5 percent
Term: 30 years
Monthly payment: $1264
Additional payment per year of: $1264
Total interest paid: $199,098.92
Total cost of your loan when paid in full: $399,098.92
Pay off date of the loan is reduced by: 6 years!

That would be helpful. That way I can see the actual numbers being utilized. I had thought all I had to do was simply change what you broke down above to ^360 instead of ^120, but didn't arrive at 455,088.98 and instead arrived at a number totaling 1.9--------- (dashes represent other numbers I do not recall).

Also, above although you broke down how to arrive at the total amount paid and then the total amount of the payments, which you eventually subtract from one another, I don't believe you broke down how you arrive at how you break down the equation that exemplifies how an additional payment of 1264 payed annually affects the overall mortgage. You mentioned the formula once, but not the step-by-step break down you so selflessly created for my benefit with the two other equations.

What I'm looking for essentially is a list of all the formulas utilized in the web page and a break down of them in the step by step fashion you created last time with the utilization of the correct values (as in the 360 month duration of the loan as opposed to 120). That way I can reach the same values/answers as the page above after going through the step by step process in lieu of values/answers representing the duration of 10 years.

Thank you in advance for you continued patience, time, and kindness.
 
My apologies, I'll have to take a deeper look into what you have already composed then. Thank you for all of your help. I hope you realize it truly is appreciated.

All things related to left hemispheric brain functioning such as reading comprehension are areas I have flourished in; at the same time, however, as you have observed, all things which rely on the right hemisphere of the brain have always been quite the formidable foe; unfortunately math is reliant upon that part of the brain; as I write this message at age 33, I am reminded of my teenage years when I had to accept that my dreams of pursuing meteorology and astronomy as academic pursuits were unobtainable.

Now that I know all of the information is in fact listed above, (I assume with the exception of the fact that I must replace 120 with 360) I'll attempt to tackle this problem, which is something I haven't done fully as of yet and decided to delay until the exact numbers the page spoke of were in play.

I truly admire your adeptness at math and hope that when I embark on this mathematical odyssey of sorts, some semblance of understanding will manifest where there once was none. With God all things are possible after all.

Take care and thank you again for everything.

Joel

P.S. I'd buy you that coffee even if further tutoring wasn't in the equation (pun intended). If you ever find yourself in New York, count on a coffee waiting for you as well as a good hearty lunch. It's the least I can do for all of your help. :)
 
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