Every step of DNA replication needs special molecules to do the work. These molecules are called enzymes. As we go through this, remember, all that is happening is the DNA is being unzipped and each side of the zipper is being copied.
Markup as a Percentage of Cost or Selling Price. Markup can be expressed as a percentage of cost or of selling price. Consider an item that costs the seller $50 and retails for $100.This is a 100-percent markup over cost, but in terms of the selling price it is only a 50-percent markup. Retailers typically express markup as a percentage of selling price.arkup as a Percentage of Cost or Selling Price. Markup can be expressed as a percentage of cost or of selling price. Consider an item that costs the seller $50 and retails for $100.
A shoe store uses a 40% markup on cost. Find the cost of a pair of shoes that sells for $63. This problem is somewhat backwards. They gave me the selling price, which is cost plus markup, and they gave me the markup rate, but they didn't tell me the actual cost or markup.