-10.53% is the change from 921 to 824
Calculation steps:
[( 824 - 921 ) ÷ 921] x 100 = -10.53%
Formula
Percentage change = [(824 - 921) / 921] x 100
Subtract the new number by the original number
824 - 921 = -97
-97 ÷ 921 = -0.10532030401737243
-0.10532030401737243 x 100 = -10.53%