A purchaser paid $403.10 for a TV that cost the seller $290. If the seller's markup was 39% of the $290 cost, then what would be the percent markup based on the selling price? (Round your answer to the nearest tenth of a percent.)

28.1%

Explanation:

Step 1:

Given that

Cost price for the seller = 290$

Selling price for the seller = 403.1$

Profit = 403.1$ - 290$ = 113.1$

Step 2:

Markup based on Selling price = (Profit/Selling Price) * 100

-> (113.1/403.1) * 100=28.057%

This can be rounded of to 28.1% (nearest tenth)