18.52% is the change from 81 to 96
Calculation steps:
[( 96 - 81 ) ÷ 81] x 100 = 18.52%
Formula
Percentage change = [(96 - 81) / 81] x 100
Subtract the new number by the original number
96 - 81 = 15
15 ÷ 81 = 0.18518518518518517
0.18518518518518517 x 100 = 18.52%