-51.42% is the change from 809 to 393
Calculation steps:
[( 393 - 809 ) ÷ 809] x 100 = -51.42%
Formula
Percentage change = [(393 - 809) / 809] x 100
Subtract the new number by the original number
393 - 809 = -416
-416 ÷ 809 = -0.5142150803461063
-0.5142150803461063 x 100 = -51.42%