-51.54% is the change from 518 to 251
Calculation steps:
[( 251 - 518 ) ÷ 518] x 100 = -51.54%
Formula
Percentage change = [(251 - 518) / 518] x 100
Subtract the new number by the original number
251 - 518 = -267
-267 ÷ 518 = -0.5154440154440154
-0.5154440154440154 x 100 = -51.54%