Markup = Selling Price – Cost Price
Markup Percentage = (Markup ÷ Cost Price) × 100
Selling Price = Cost Price + Markup
Cost Price = Selling Price – Markup
If markup percentage is known, Markup = Cost Price × (Markup Percentage ÷ 100)
If markup percentage is known, Selling Price = Cost Price × (1 + Markup Percentage ÷ 100)
If selling price and markup percentage are known, Cost Price = Selling Price ÷ (1 + Markup Percentage ÷ 100)