-26.06% is the change from 871 to 644
Calculation steps:
[( 644 - 871 ) ÷ 871] x 100 = -26.06%
Formula
Percentage change = [(644 - 871) / 871] x 100
Subtract the new number by the original number
644 - 871 = -227
-227 ÷ 871 = -0.2606199770378875
-0.2606199770378875 x 100 = -26.06%