An item has a 45% markup based on selling price. What is the equivalent markup percent based on the cost?

More data needed.

To find the equivalent markup percent based on the cost, we need to understand the relationship between the selling price and the cost.

We know that the selling price has a 45% markup based on the selling price. This means that the selling price is 145% of the cost.

To find the equivalent markup percent based on the cost, we can use the formula:

Markup percent based on cost = (Selling price - Cost) / Cost * 100

In this case, we need to rearrange the formula to solve for the markup percent based on the cost:

Markup percent based on cost = (Selling price - Cost) / Cost * 100
= ((145% of Cost) - Cost) / Cost * 100

Now we can calculate the markup percent based on the cost:

Markup percent based on cost = ((145% of Cost) - Cost) / Cost * 100
= (1.45 * Cost - Cost) / Cost * 100
= (0.45 * Cost) / Cost * 100
= 45%

Therefore, the equivalent markup percent based on the cost is 45%.