-39.77% is the change from 860 to 518
Calculation steps:
[( 518 - 860 ) ÷ 860] x 100 = -39.77%
Formula
Percentage change = [(518 - 860) / 860] x 100
Subtract the new number by the original number
518 - 860 = -342
-342 ÷ 860 = -0.39767441860465114
-0.39767441860465114 x 100 = -39.77%