-31.07% is the change from 721 to 497
Calculation steps:
[( 497 - 721 ) ÷ 721] x 100 = -31.07%
Formula
Percentage change = [(497 - 721) / 721] x 100
Subtract the new number by the original number
497 - 721 = -224
-224 ÷ 721 = -0.3106796116504854
-0.3106796116504854 x 100 = -31.07%