-3.35% is the change from 837 to 809
Calculation steps:
[( 809 - 837 ) ÷ 837] x 100 = -3.35%
Formula
Percentage change = [(809 - 837) / 837] x 100
Subtract the new number by the original number
809 - 837 = -28
-28 ÷ 837 = -0.03345280764635603
-0.03345280764635603 x 100 = -3.35%