-20.8% is the change from 721 to 571
Calculation steps:
[( 571 - 721 ) ÷ 721] x 100 = -20.8%
Formula
Percentage change = [(571 - 721) / 721] x 100
Subtract the new number by the original number
571 - 721 = -150
-150 ÷ 721 = -0.20804438280166435
-0.20804438280166435 x 100 = -20.8%