How do you calculate a Markup For example i want to sell a 200.00 item a 25 Markup?

You mark things up with percentages. Example your $200.00 item X 25% would be $50.00 dollars. If you want to make $25.00 on an item you payed $200.00 for then you would divide the $25.00 dollars by $200.00 which would equal .125 or 12.5%. When you multiply 12.5% by $200 your answer would be $25.00!