Question

Erika has a baking company and needs to purchase 17 pounds of flour for her cakes. The Baking Goods Store sells two different-sized bags of flour. The table shows the amounts of flour in the bag, the number of bags at the store, and the cost per bag of flour. Size Pounds 1 Bags for Sale 75 Cost per Bag Small $0.84 5 Large 4 4 $16.80 If Erika buys all of the large bags, how many small bags will she need? A. 7 small bags B. 12 small bags C. 28 small bags D. 71 small bags

Answer 1

There are 4 large bags, and each one has 4 pounds. Then, since she buys all of the large bags, she already has

$4\times4=16$

16 pounds. So, she only needs

$17\text{ }\frac{2}{5}-16=1\text{ }\frac{2}{5}=\frac{5}{5}+\frac{2}{5}=\frac{7}{5}$

1 2/5 pounds more, this fraction is equals to 7/5 pounds. Since the small bags only contains 1/5 pounds of flour, then, she needs

$\frac{\frac{7}{5}}{\frac{1}{5}}=\frac{7}{5}\times\frac{5}{1}=\frac{7\times5}{5\times1}=7$

7 small bags