-50.4% is the change from 877 to 435
Calculation steps:
[( 435 - 877 ) ÷ 877] x 100 = -50.4%
Formula
Percentage change = [(435 - 877) / 877] x 100
Subtract the new number by the original number
435 - 877 = -442
-442 ÷ 877 = -0.5039908779931584
-0.5039908779931584 x 100 = -50.4%