-41.5% is the change from 865 to 506
Calculation steps:
[( 506 - 865 ) ÷ 865] x 100 = -41.5%
Formula
Percentage change = [(506 - 865) / 865] x 100
Subtract the new number by the original number
506 - 865 = -359
-359 ÷ 865 = -0.41502890173410406
-0.41502890173410406 x 100 = -41.5%