-4.78% is the change from 921 to 877
Calculation steps:
[( 877 - 921 ) ÷ 921] x 100 = -4.78%
Formula
Percentage change = [(877 - 921) / 921] x 100
Subtract the new number by the original number
877 - 921 = -44
-44 ÷ 921 = -0.04777415852334419
-0.04777415852334419 x 100 = -4.78%