-88.73% is the change from 710 to 80
Calculation steps:
[( 80 - 710 ) ÷ 710] x 100 = -88.73%
Formula
Percentage change = [(80 - 710) / 710] x 100
Subtract the new number by the original number
80 - 710 = -630
-630 ÷ 710 = -0.8873239436619719
-0.8873239436619719 x 100 = -88.73%