-50.45% is the change from 220 to 109
Calculation steps:
[( 109 - 220 ) ÷ 220] x 100 = -50.45%
Formula
Percentage change = [(109 - 220) / 220] x 100
Subtract the new number by the original number
109 - 220 = -111
-111 ÷ 220 = -0.5045454545454545
-0.5045454545454545 x 100 = -50.45%