-4.67% is the change from 921 to 878
Calculation steps:
[( 878 - 921 ) ÷ 921] x 100 = -4.67%
Formula
Percentage change = [(878 - 921) / 921] x 100
Subtract the new number by the original number
878 - 921 = -43
-43 ÷ 921 = -0.04668838219326819
-0.04668838219326819 x 100 = -4.67%