-10.15% is the change from 877 to 788
Calculation steps:
[( 788 - 877 ) ÷ 877] x 100 = -10.15%
Formula
Percentage change = [(788 - 877) / 877] x 100
Subtract the new number by the original number
788 - 877 = -89
-89 ÷ 877 = -0.10148232611174458
-0.10148232611174458 x 100 = -10.15%