-27.27% is the change from 110 to 80
Calculation steps:
[( 80 - 110 ) ÷ 110] x 100 = -27.27%
Formula
Percentage change = [(80 - 110) / 110] x 100
Subtract the new number by the original number
80 - 110 = -30
-30 ÷ 110 = -0.2727272727272727
-0.2727272727272727 x 100 = -27.27%