What is the percentage markup if a retailer sells a product for $9 after buying it for $6?

The percentage markup is calculated using the formula:

[

\text{Percentage Markup} = \frac{\text{Selling Price} - \text{Cost Price}}{\text{Cost Price}} \times 100

]

In this scenario, the selling price of the product is $9, and the cost price is $6. First, we find the difference between the selling price and the cost price:

[

\text{Markup Amount} = 9 - 6 = 3

]

Next, we divide the markup amount by the cost price:

[

\frac{3}{6} = 0.5

]

Finally, we convert this fraction into a percentage by multiplying by 100:

[

0.5 \times 100 = 50%

]

This calculation shows that the percentage markup is 50%. The correct understanding of how to compute percentage markup, reflecting the difference between cost and selling prices relative to the cost price, leads to this result.