-4.45% is the change from 921 to 880
Calculation steps:
[( 880 - 921 ) ÷ 921] x 100 = -4.45%
Formula
Percentage change = [(880 - 921) / 921] x 100
Subtract the new number by the original number
880 - 921 = -41
-41 ÷ 921 = -0.04451682953311618
-0.04451682953311618 x 100 = -4.45%