Respuesta :

We have

80- 50=30

then we need to obtain the percentage

[tex]\frac{30}{80}=\frac{p}{100}[/tex]

where p is the percentage of the markup, we clear p

[tex]p=\frac{30\cdot100}{80}=37.5\text{ \%}[/tex]

the percentage of the markup is 37.5%