-41.16% is the change from 865 to 509
Calculation steps:
[( 509 - 865 ) ÷ 865] x 100 = -41.16%
Formula
Percentage change = [(509 - 865) / 865] x 100
Subtract the new number by the original number
509 - 865 = -356
-356 ÷ 865 = -0.4115606936416185
-0.4115606936416185 x 100 = -41.16%