prob. that 15 or fewer would be in favor if claim is correct

[sunshine09]

A student government states that 80% of all favor an increase in student sample to subsidize a new recreational area. a random sample of n=25 students produced 15 in favor of increased fees. what is the probability that 15 or fewer in the sample would favor the issue if students gov is correct/ do the data support the student gov assertion, or does it appear that the percentage favoring an increase in fees is less that 80%?

i believe n=25 p=15 (.08)

please help..id appreciate a bunch..