-11.48% is the change from 871 to 771
Calculation steps:
[( 771 - 871 ) ÷ 871] x 100 = -11.48%
Formula
Percentage change = [(771 - 871) / 871] x 100
Subtract the new number by the original number
771 - 871 = -100
-100 ÷ 871 = -0.1148105625717566
-0.1148105625717566 x 100 = -11.48%