90.12% is the change from 81 to 154
Calculation steps:
[( 154 - 81 ) ÷ 81] x 100 = 90.12%
Formula
Percentage change = [(154 - 81) / 81] x 100
Subtract the new number by the original number
154 - 81 = 73
73 ÷ 81 = 0.9012345679012346
0.9012345679012346 x 100 = 90.12%