-2.27% is the change from 837 to 818
Calculation steps:
[( 818 - 837 ) ÷ 837] x 100 = -2.27%
Formula
Percentage change = [(818 - 837) / 837] x 100
Subtract the new number by the original number
818 - 837 = -19
-19 ÷ 837 = -0.022700119474313024
-0.022700119474313024 x 100 = -2.27%