-40.92% is the change from 865 to 511
Calculation steps:
[( 511 - 865 ) ÷ 865] x 100 = -40.92%
Formula
Percentage change = [(511 - 865) / 865] x 100
Subtract the new number by the original number
511 - 865 = -354
-354 ÷ 865 = -0.4092485549132948
-0.4092485549132948 x 100 = -40.92%