Respuesta :

Percentage Mark -up =

[tex]=\frac{new\text{ value -old value}}{\text{old value}}\times100percent[/tex][tex]=\frac{15\text{ - 12}}{12}\times100percent[/tex][tex]=\frac{3}{12}\times100percent[/tex][tex]=\frac{1}{4}\times100\text{ percent}[/tex]

= 25%

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