-30.79% is the change from 721 to 499
Calculation steps:
[( 499 - 721 ) ÷ 721] x 100 = -30.79%
Formula
Percentage change = [(499 - 721) / 721] x 100
Subtract the new number by the original number
499 - 721 = -222
-222 ÷ 721 = -0.3079056865464632
-0.3079056865464632 x 100 = -30.79%