-39.98% is the change from 863 to 518
Calculation steps:
[( 518 - 863 ) ÷ 863] x 100 = -39.98%
Formula
Percentage change = [(518 - 863) / 863] x 100
Subtract the new number by the original number
518 - 863 = -345
-345 ÷ 863 = -0.39976825028968715
-0.39976825028968715 x 100 = -39.98%