-10.57% is the change from 861 to 770
Calculation steps:
[( 770 - 861 ) ÷ 861] x 100 = -10.57%
Formula
Percentage change = [(770 - 861) / 861] x 100
Subtract the new number by the original number
770 - 861 = -91
-91 ÷ 861 = -0.10569105691056911
-0.10569105691056911 x 100 = -10.57%