-87.1% is the change from 721 to 93
Calculation steps:
[( 93 - 721 ) ÷ 721] x 100 = -87.1%
Formula
Percentage change = [(93 - 721) / 721] x 100
Subtract the new number by the original number
93 - 721 = -628
-628 ÷ 721 = -0.871012482662968
-0.871012482662968 x 100 = -87.1%