-17.53% is the change from 97 to 80
Calculation steps:
[( 80 - 97 ) ÷ 97] x 100 = -17.53%
Formula
Percentage change = [(80 - 97) / 97] x 100
Subtract the new number by the original number
80 - 97 = -17
-17 ÷ 97 = -0.17525773195876287
-0.17525773195876287 x 100 = -17.53%