-20.78% is the change from 871 to 690
Calculation steps:
[( 690 - 871 ) ÷ 871] x 100 = -20.78%
Formula
Percentage change = [(690 - 871) / 871] x 100
Subtract the new number by the original number
690 - 871 = -181
-181 ÷ 871 = -0.20780711825487944
-0.20780711825487944 x 100 = -20.78%