65.43% is the change from 81 to 134
Calculation steps:
[( 134 - 81 ) ÷ 81] x 100 = 65.43%
Formula
Percentage change = [(134 - 81) / 81] x 100
Subtract the new number by the original number
134 - 81 = 53
53 ÷ 81 = 0.654320987654321
0.654320987654321 x 100 = 65.43%