-17.22% is the change from 871 to 721
Calculation steps:
[( 721 - 871 ) ÷ 871] x 100 = -17.22%
Formula
Percentage change = [(721 - 871) / 871] x 100
Subtract the new number by the original number
721 - 871 = -150
-150 ÷ 871 = -0.17221584385763491
-0.17221584385763491 x 100 = -17.22%