-43.27% is the change from 171 to 97
Calculation steps:
[( 97 - 171 ) ÷ 171] x 100 = -43.27%
Formula
Percentage change = [(97 - 171) / 171] x 100
Subtract the new number by the original number
97 - 171 = -74
-74 ÷ 171 = -0.4327485380116959
-0.4327485380116959 x 100 = -43.27%