-7.75% is the change from 877 to 809
Calculation steps:
[( 809 - 877 ) ÷ 877] x 100 = -7.75%
Formula
Percentage change = [(809 - 877) / 877] x 100
Subtract the new number by the original number
809 - 877 = -68
-68 ÷ 877 = -0.07753705815279362
-0.07753705815279362 x 100 = -7.75%