-4.9% is the change from 877 to 834
Calculation steps:
[( 834 - 877 ) ÷ 877] x 100 = -4.9%
Formula
Percentage change = [(834 - 877) / 877] x 100
Subtract the new number by the original number
834 - 877 = -43
-43 ÷ 877 = -0.04903078677309008
-0.04903078677309008 x 100 = -4.9%