-23.77% is the change from 871 to 664
Calculation steps:
[( 664 - 871 ) ÷ 871] x 100 = -23.77%
Formula
Percentage change = [(664 - 871) / 871] x 100
Subtract the new number by the original number
664 - 871 = -207
-207 ÷ 871 = -0.23765786452353616
-0.23765786452353616 x 100 = -23.77%