-72.45% is the change from 871 to 240
Calculation steps:
[( 240 - 871 ) ÷ 871] x 100 = -72.45%
Formula
Percentage change = [(240 - 871) / 871] x 100
Subtract the new number by the original number
240 - 871 = -631
-631 ÷ 871 = -0.7244546498277842
-0.7244546498277842 x 100 = -72.45%