-81.28% is the change from 721 to 135
Calculation steps:
[( 135 - 721 ) ÷ 721] x 100 = -81.28%
Formula
Percentage change = [(135 - 721) / 721] x 100
Subtract the new number by the original number
135 - 721 = -586
-586 ÷ 721 = -0.812760055478502
-0.812760055478502 x 100 = -81.28%