97.59% is the change from 83 to 164
Calculation steps:
[( 164 - 83 ) ÷ 83] x 100 = 97.59%
Formula
Percentage change = [(164 - 83) / 83] x 100
Subtract the new number by the original number
164 - 83 = 81
81 ÷ 83 = 0.9759036144578314
0.9759036144578314 x 100 = 97.59%