-30.79% is the change from 877 to 607
Calculation steps:
[( 607 - 877 ) ÷ 877] x 100 = -30.79%
Formula
Percentage change = [(607 - 877) / 877] x 100
Subtract the new number by the original number
607 - 877 = -270
-270 ÷ 877 = -0.30786773090079816
-0.30786773090079816 x 100 = -30.79%