-24.23% is the change from 871 to 660
Calculation steps:
[( 660 - 871 ) ÷ 871] x 100 = -24.23%
Formula
Percentage change = [(660 - 871) / 871] x 100
Subtract the new number by the original number
660 - 871 = -211
-211 ÷ 871 = -0.24225028702640644
-0.24225028702640644 x 100 = -24.23%