Part( after increase) is $32.20 Rate of increase is 15% The base is

Question

I truly need help with this math problem, I’m trying to find several ways to arrive at my answer. But I’m coming up short can someone show me a way.

Answer 1

n=base

you want all of the base(100%)+15% more to get $32.20

100%=1

15%=0.15

1.15*n=32.2

n=32.2/1.15

n=3220/115

n=$28

15% of 28=0.15*28=4.2

$28.00+$4.20=$32.20

Answer 2