-30.33% is the change from 877 to 611
Calculation steps:
[( 611 - 877 ) ÷ 877] x 100 = -30.33%
Formula
Percentage change = [(611 - 877) / 877] x 100
Subtract the new number by the original number
611 - 877 = -266
-266 ÷ 877 = -0.3033067274800456
-0.3033067274800456 x 100 = -30.33%