-6.81% is the change from 837 to 780
Calculation steps:
[( 780 - 837 ) ÷ 837] x 100 = -6.81%
Formula
Percentage change = [(780 - 837) / 837] x 100
Subtract the new number by the original number
780 - 837 = -57
-57 ÷ 837 = -0.06810035842293907
-0.06810035842293907 x 100 = -6.81%