1/5 + 3 1/7 = topic = middle school mathematics

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

Which expression is equivalent to the expression shown?

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30