96.3% is the change from 81 to 159
Calculation steps:
[( 159 - 81 ) ÷ 81] x 100 = 96.3%
Formula
Percentage change = [(159 - 81) / 81] x 100
Subtract the new number by the original number
159 - 81 = 78
78 ÷ 81 = 0.9629629629629629
0.9629629629629629 x 100 = 96.3%