geometry probellm, help please? explain how you got there, i suck at word problems.?

Question

Last week Kiplinger released its list of the 100 best values in public colleges. Congratulations to The University of North Carolina at Chapel Hill (UNC) for being at the top of the list! UNC charges about $4600 for in-state tuition and fees. Kiplinger’s list may be more important than ever considering the average tuition and fees at four-year public colleges have increased by 57% since five years ago. According to this average increase, what would we estimate the cost of in-state tuition and fees for UNC to have been five years ago? Express your answer to the nearest dollar.

Answer 1

Let's write an equation:
Pf = Pi * 157% where:
Pf = final price (current tuition cost)
Pi = initial price (tuition cost 5 years ago)
4600 = Pi * 157%
4600 = Pi * 1.57
Pi = 4600 / 1.57 = $2930 (solution!)