-24.55% is the change from 220 to 166
Calculation steps:
[( 166 - 220 ) ÷ 220] x 100 = -24.55%
Formula
Percentage change = [(166 - 220) / 220] x 100
Subtract the new number by the original number
166 - 220 = -54
-54 ÷ 220 = -0.24545454545454545
-0.24545454545454545 x 100 = -24.55%