-41.57% is the change from 166 to 97
Calculation steps:
[( 97 - 166 ) ÷ 166] x 100 = -41.57%
Formula
Percentage change = [(97 - 166) / 166] x 100
Subtract the new number by the original number
97 - 166 = -69
-69 ÷ 166 = -0.41566265060240964
-0.41566265060240964 x 100 = -41.57%