-42.48% is the change from 871 to 501
Calculation steps:
[( 501 - 871 ) ÷ 871] x 100 = -42.48%
Formula
Percentage change = [(501 - 871) / 871] x 100
Subtract the new number by the original number
501 - 871 = -370
-370 ÷ 871 = -0.42479908151549944
-0.42479908151549944 x 100 = -42.48%