Please help I need to know how to solve these questions

4. If the markup on the cost is 76 percent, what is the markup on the selling price? 5. The buyer for the women's sweater department has purchased wool sweaters for $35.69. She uses an odd pricing policy and wants to sell them at a 49-percent markup on the selling price. At what price should each sweater be sold? 6. Compute the markup on the selling price for an item that retails for $49.95 and costs $31.20