-37.45% is the change from 721 to 451
Calculation steps:
[( 451 - 721 ) ÷ 721] x 100 = -37.45%
Formula
Percentage change = [(451 - 721) / 721] x 100
Subtract the new number by the original number
451 - 721 = -270
-270 ÷ 721 = -0.37447988904299584
-0.37447988904299584 x 100 = -37.45%