-3.31% is the change from 847 to 819
Calculation steps:
[( 819 - 847 ) ÷ 847] x 100 = -3.31%
Formula
Percentage change = [(819 - 847) / 847] x 100
Subtract the new number by the original number
819 - 847 = -28
-28 ÷ 847 = -0.03305785123966942
-0.03305785123966942 x 100 = -3.31%