-24.22% is the change from 128 to 97
Calculation steps:
[( 97 - 128 ) ÷ 128] x 100 = -24.22%
Formula
Percentage change = [(97 - 128) / 128] x 100
Subtract the new number by the original number
97 - 128 = -31
-31 ÷ 128 = -0.2421875
-0.2421875 x 100 = -24.22%