The Food Co-op Club boasts that it has 5,000 members and a 200% increase in sales. Their markup is 36% based on cost. What would be its percent markup if selling price were the base?

Answer: 26.47%

Step-by-step explanation:

Given the following:

markup based on cost = 36%

Assume a cost of $50

$50 * 1.36 = $68

Now, markup based on the selling price;

$68 - $50 = $18

Therefore, ratio of cost price to selling price:

18 / 68 = 26.47%