-1.8% is the change from 833 to 818
Calculation steps:
[( 818 - 833 ) ÷ 833] x 100 = -1.8%
Formula
Percentage change = [(818 - 833) / 833] x 100
Subtract the new number by the original number
818 - 833 = -15
-15 ÷ 833 = -0.01800720288115246
-0.01800720288115246 x 100 = -1.8%