-39.13% is the change from 851 to 518
Calculation steps:
[( 518 - 851 ) ÷ 851] x 100 = -39.13%
Formula
Percentage change = [(518 - 851) / 851] x 100
Subtract the new number by the original number
518 - 851 = -333
-333 ÷ 851 = -0.391304347826087
-0.391304347826087 x 100 = -39.13%