-2.24% is the change from 847 to 828
Calculation steps:
[( 828 - 847 ) ÷ 847] x 100 = -2.24%
Formula
Percentage change = [(828 - 847) / 847] x 100
Subtract the new number by the original number
828 - 847 = -19
-19 ÷ 847 = -0.02243211334120425
-0.02243211334120425 x 100 = -2.24%