-27.88% is the change from 721 to 520
Calculation steps:
[( 520 - 721 ) ÷ 721] x 100 = -27.88%
Formula
Percentage change = [(520 - 721) / 721] x 100
Subtract the new number by the original number
520 - 721 = -201
-201 ÷ 721 = -0.2787794729542302
-0.2787794729542302 x 100 = -27.88%