-69.31% is the change from 518 to 159
Calculation steps:
[( 159 - 518 ) ÷ 518] x 100 = -69.31%
Formula
Percentage change = [(159 - 518) / 518] x 100
Subtract the new number by the original number
159 - 518 = -359
-359 ÷ 518 = -0.693050193050193
-0.693050193050193 x 100 = -69.31%