-65.64% is the change from 809 to 278
Calculation steps:
[( 278 - 809 ) ÷ 809] x 100 = -65.64%
Formula
Percentage change = [(278 - 809) / 809] x 100
Subtract the new number by the original number
278 - 809 = -531
-531 ÷ 809 = -0.6563658838071693
-0.6563658838071693 x 100 = -65.64%