-63.49% is the change from 871 to 318
Calculation steps:
[( 318 - 871 ) ÷ 871] x 100 = -63.49%
Formula
Percentage change = [(318 - 871) / 871] x 100
Subtract the new number by the original number
318 - 871 = -553
-553 ÷ 871 = -0.634902411021814
-0.634902411021814 x 100 = -63.49%