-27.73% is the change from 220 to 159
Calculation steps:
[( 159 - 220 ) ÷ 220] x 100 = -27.73%
Formula
Percentage change = [(159 - 220) / 220] x 100
Subtract the new number by the original number
159 - 220 = -61
-61 ÷ 220 = -0.2772727272727273
-0.2772727272727273 x 100 = -27.73%