-86.27% is the change from 721 to 99
Calculation steps:
[( 99 - 721 ) ÷ 721] x 100 = -86.27%
Formula
Percentage change = [(99 - 721) / 721] x 100
Subtract the new number by the original number
99 - 721 = -622
-622 ÷ 721 = -0.8626907073509015
-0.8626907073509015 x 100 = -86.27%