-39.7% is the change from 859 to 518
Calculation steps:
[( 518 - 859 ) ÷ 859] x 100 = -39.7%
Formula
Percentage change = [(518 - 859) / 859] x 100
Subtract the new number by the original number
518 - 859 = -341
-341 ÷ 859 = -0.3969732246798603
-0.3969732246798603 x 100 = -39.7%