-25.49% is the change from 871 to 649
Calculation steps:
[( 649 - 871 ) ÷ 871] x 100 = -25.49%
Formula
Percentage change = [(649 - 871) / 871] x 100
Subtract the new number by the original number
649 - 871 = -222
-222 ÷ 871 = -0.25487944890929964
-0.25487944890929964 x 100 = -25.49%