Or you can do it in a more simpler way. the way that i prefer to do it.
the dress was $50.00. It has a 10% discount. Turn both numbers into fractions.
50/1 x 10/100.
50 10
1 x 100
simplify and you get a total of 5. Right???
Then, 5= the total amount that you take off off the dress, so.........
you subtract 5 from 50 and get $45.00. Got it???