-55.22% is the change from 871 to 390
Calculation steps:
[( 390 - 871 ) ÷ 871] x 100 = -55.22%
Formula
Percentage change = [(390 - 871) / 871] x 100
Subtract the new number by the original number
390 - 871 = -481
-481 ÷ 871 = -0.5522388059701493
-0.5522388059701493 x 100 = -55.22%