-39.75% is the change from 161 to 97
Calculation steps:
[( 97 - 161 ) ÷ 161] x 100 = -39.75%
Formula
Percentage change = [(97 - 161) / 161] x 100
Subtract the new number by the original number
97 - 161 = -64
-64 ÷ 161 = -0.39751552795031053
-0.39751552795031053 x 100 = -39.75%