-64.29% is the change from 871 to 311
Calculation steps:
[( 311 - 871 ) ÷ 871] x 100 = -64.29%
Formula
Percentage change = [(311 - 871) / 871] x 100
Subtract the new number by the original number
311 - 871 = -560
-560 ÷ 871 = -0.642939150401837
-0.642939150401837 x 100 = -64.29%