Amount of potatoes that Zoe has = 5 pounds Quantity of potatoes that Zoe need for each recipe = 5/(3/4) = 5 * (4/3) = 20/3 = 6 2/3 From the above deduction, we can conclude that only 6 recipes can be made. The remaining amount of 2/3 will remain unused. I hope the procedure is clear enough for you to understand.