38.55% is the change from 83 to 115
Calculation steps:
[( 115 - 83 ) ÷ 83] x 100 = 38.55%
Formula
Percentage change = [(115 - 83) / 83] x 100
Subtract the new number by the original number
115 - 83 = 32
32 ÷ 83 = 0.3855421686746988
0.3855421686746988 x 100 = 38.55%