-33.7% is the change from 721 to 478
Calculation steps:
[( 478 - 721 ) ÷ 721] x 100 = -33.7%
Formula
Percentage change = [(478 - 721) / 721] x 100
Subtract the new number by the original number
478 - 721 = -243
-243 ÷ 721 = -0.33703190013869627
-0.33703190013869627 x 100 = -33.7%