91.57% is the change from 83 to 159
Calculation steps:
[( 159 - 83 ) ÷ 83] x 100 = 91.57%
Formula
Percentage change = [(159 - 83) / 83] x 100
Subtract the new number by the original number
159 - 83 = 76
76 ÷ 83 = 0.9156626506024096
0.9156626506024096 x 100 = 91.57%