-31.9% is the change from 721 to 491
Calculation steps:
[( 491 - 721 ) ÷ 721] x 100 = -31.9%
Formula
Percentage change = [(491 - 721) / 721] x 100
Subtract the new number by the original number
491 - 721 = -230
-230 ÷ 721 = -0.31900138696255204
-0.31900138696255204 x 100 = -31.9%