-58.1% is the change from 809 to 339
Calculation steps:
[( 339 - 809 ) ÷ 809] x 100 = -58.1%
Formula
Percentage change = [(339 - 809) / 809] x 100
Subtract the new number by the original number
339 - 809 = -470
-470 ÷ 809 = -0.580964153275649
-0.580964153275649 x 100 = -58.1%