19.75% is the change from 81 to 97
Calculation steps:
[( 97 - 81 ) ÷ 81] x 100 = 19.75%
Formula
Percentage change = [(97 - 81) / 81] x 100
Subtract the new number by the original number
97 - 81 = 16
16 ÷ 81 = 0.19753086419753085
0.19753086419753085 x 100 = 19.75%