Question

If it takes 7lb of flour to make 3 loaves of bread, how much flour is needed to make 7 loaves of bread?

Answer 1

Answer: 16 and one third lbs

7/3 is the amount of flour needed for one loaf, so you multiply that by 7

The answer is 49/3, or 16 and one third

Answer 2

16 1/3 lbs

Explanation:

We can write a ratio to solve

7 lbs x lbs

-------------- = -------------

3 loaves 7 loaves

Using cross products

7 * 7 = 3x

49 = 3x

Divide each side by 3

49/3 = 3x/3

16 1/3 lbs