-3.42% is the change from 847 to 818
Calculation steps:
[( 818 - 847 ) ÷ 847] x 100 = -3.42%
Formula
Percentage change = [(818 - 847) / 847] x 100
Subtract the new number by the original number
818 - 847 = -29
-29 ÷ 847 = -0.03423848878394333
-0.03423848878394333 x 100 = -3.42%