-88.89% is the change from 720 to 80
Calculation steps:
[( 80 - 720 ) ÷ 720] x 100 = -88.89%
Formula
Percentage change = [(80 - 720) / 720] x 100
Subtract the new number by the original number
80 - 720 = -640
-640 ÷ 720 = -0.8888888888888888
-0.8888888888888888 x 100 = -88.89%