21.25% is the change from 80 to 97
Calculation steps:
[( 97 - 80 ) ÷ 80] x 100 = 21.25%
Formula
Percentage change = [(97 - 80) / 80] x 100
Subtract the new number by the original number
97 - 80 = 17
17 ÷ 80 = 0.2125
0.2125 x 100 = 21.25%
Example