86.42% is the change from 81 to 151
Calculation steps:
[( 151 - 81 ) ÷ 81] x 100 = 86.42%
Formula
Percentage change = [(151 - 81) / 81] x 100
Subtract the new number by the original number
151 - 81 = 70
70 ÷ 81 = 0.8641975308641975
0.8641975308641975 x 100 = 86.42%