-38.64% is the change from 220 to 135
Calculation steps:
[( 135 - 220 ) ÷ 220] x 100 = -38.64%
Formula
Percentage change = [(135 - 220) / 220] x 100
Subtract the new number by the original number
135 - 220 = -85
-85 ÷ 220 = -0.38636363636363635
-0.38636363636363635 x 100 = -38.64%