-2.25% is the change from 843 to 824
Calculation steps:
[( 824 - 843 ) ÷ 843] x 100 = -2.25%
Formula
Percentage change = [(824 - 843) / 843] x 100
Subtract the new number by the original number
824 - 843 = -19
-19 ÷ 843 = -0.022538552787663108
-0.022538552787663108 x 100 = -2.25%