-42.14% is the change from 871 to 504
Calculation steps:
[( 504 - 871 ) ÷ 871] x 100 = -42.14%
Formula
Percentage change = [(504 - 871) / 871] x 100
Subtract the new number by the original number
504 - 871 = -367
-367 ÷ 871 = -0.4213547646383467
-0.4213547646383467 x 100 = -42.14%