-58.15% is the change from 810 to 339
Calculation steps:
[( 339 - 810 ) ÷ 810] x 100 = -58.15%
Formula
Percentage change = [(339 - 810) / 810] x 100
Subtract the new number by the original number
339 - 810 = -471
-471 ÷ 810 = -0.5814814814814815
-0.5814814814814815 x 100 = -58.15%