-2.2% is the change from 818 to 800
Calculation steps:
[( 800 - 818 ) ÷ 818] x 100 = -2.2%
Formula
Percentage change = [(800 - 818) / 818] x 100
Subtract the new number by the original number
800 - 818 = -18
-18 ÷ 818 = -0.022004889975550123
-0.022004889975550123 x 100 = -2.2%