How do you work out the mark-up in a business?

Mark-upon is a percentage of the cost price.It's the amount that you add to the cost of an item to reach its selling price, and it's calculated like this:

Mark-up = Gross Profit/Cost x 100

What mark-up do you need?

The following formulas can be used to work out what mark-up will produce a certain margin:

Mark-up= Margin x 100/100-Margin

Margin= Mark-up x 100/100+Mark-Up