-24.52% is the change from 518 to 391
Calculation steps:
[( 391 - 518 ) ÷ 518] x 100 = -24.52%
Formula
Percentage change = [(391 - 518) / 518] x 100
Subtract the new number by the original number
391 - 518 = -127
-127 ÷ 518 = -0.24517374517374518
-0.24517374517374518 x 100 = -24.52%