-8.36% is the change from 921 to 844
Calculation steps:
[( 844 - 921 ) ÷ 921] x 100 = -8.36%
Formula
Percentage change = [(844 - 921) / 921] x 100
Subtract the new number by the original number
844 - 921 = -77
-77 ÷ 921 = -0.08360477741585233
-0.08360477741585233 x 100 = -8.36%