-10.64% is the change from 921 to 823
Calculation steps:
[( 823 - 921 ) ÷ 921] x 100 = -10.64%
Formula
Percentage change = [(823 - 921) / 921] x 100
Subtract the new number by the original number
823 - 921 = -98
-98 ÷ 921 = -0.10640608034744843
-0.10640608034744843 x 100 = -10.64%