-23.88% is the change from 871 to 663
Calculation steps:
[( 663 - 871 ) ÷ 871] x 100 = -23.88%
Formula
Percentage change = [(663 - 871) / 871] x 100
Subtract the new number by the original number
663 - 871 = -208
-208 ÷ 871 = -0.23880597014925373
-0.23880597014925373 x 100 = -23.88%