-30.91% is the change from 220 to 152
Calculation steps:
[( 152 - 220 ) ÷ 220] x 100 = -30.91%
Formula
Percentage change = [(152 - 220) / 220] x 100
Subtract the new number by the original number
152 - 220 = -68
-68 ÷ 220 = -0.3090909090909091
-0.3090909090909091 x 100 = -30.91%