-41.02% is the change from 863 to 509
Calculation steps:
[( 509 - 863 ) ÷ 863] x 100 = -41.02%
Formula
Percentage change = [(509 - 863) / 863] x 100
Subtract the new number by the original number
509 - 863 = -354
-354 ÷ 863 = -0.4101969872537659
-0.4101969872537659 x 100 = -41.02%