-50.23% is the change from 219 to 109
Calculation steps:
[( 109 - 219 ) ÷ 219] x 100 = -50.23%
Formula
Percentage change = [(109 - 219) / 219] x 100
Subtract the new number by the original number
109 - 219 = -110
-110 ÷ 219 = -0.502283105022831
-0.502283105022831 x 100 = -50.23%