-72.41% is the change from 290 to 80
Calculation steps:
[( 80 - 290 ) ÷ 290] x 100 = -72.41%
Formula
Percentage change = [(80 - 290) / 290] x 100
Subtract the new number by the original number
80 - 290 = -210
-210 ÷ 290 = -0.7241379310344828
-0.7241379310344828 x 100 = -72.41%