-64.15% is the change from 809 to 290
Calculation steps:
[( 290 - 809 ) ÷ 809] x 100 = -64.15%
Formula
Percentage change = [(290 - 809) / 809] x 100
Subtract the new number by the original number
290 - 809 = -519
-519 ÷ 809 = -0.6415327564894932
-0.6415327564894932 x 100 = -64.15%