-21.5% is the change from 721 to 566
Calculation steps:
[( 566 - 721 ) ÷ 721] x 100 = -21.5%
Formula
Percentage change = [(566 - 721) / 721] x 100
Subtract the new number by the original number
566 - 721 = -155
-155 ÷ 721 = -0.21497919556171982
-0.21497919556171982 x 100 = -21.5%