-29.26% is the change from 721 to 510
Calculation steps:
[( 510 - 721 ) ÷ 721] x 100 = -29.26%
Formula
Percentage change = [(510 - 721) / 721] x 100
Subtract the new number by the original number
510 - 721 = -211
-211 ÷ 721 = -0.2926490984743412
-0.2926490984743412 x 100 = -29.26%