97.53% is the change from 81 to 160
Calculation steps:
[( 160 - 81 ) ÷ 81] x 100 = 97.53%
Formula
Percentage change = [(160 - 81) / 81] x 100
Subtract the new number by the original number
160 - 81 = 79
79 ÷ 81 = 0.9753086419753086
0.9753086419753086 x 100 = 97.53%