-81.82% is the change from 110 to 20
Calculation steps:
[( 20 - 110 ) ÷ 110] x 100 = -81.82%
Formula
Percentage change = [(20 - 110) / 110] x 100
Subtract the new number by the original number
20 - 110 = -90
-90 ÷ 110 = -0.8181818181818182
-0.8181818181818182 x 100 = -81.82%