-8.64% is the change from 220 to 201
Calculation steps:
[( 201 - 220 ) ÷ 220] x 100 = -8.64%
Formula
Percentage change = [(201 - 220) / 220] x 100
Subtract the new number by the original number
201 - 220 = -19
-19 ÷ 220 = -0.08636363636363636
-0.08636363636363636 x 100 = -8.64%