Math CentralQuandaries & Queries


Question from John, a student:

Paul is making banana bread. The number of cups of bananas he uses is proportional to the number of loaves of bread. Paul uses 11 1/4 cups of bananas to make 5 loaves of bread. Which equation represents the relationship between c, the number of cups of bananas, and b, the number of loaves of bread?
A) C=4/9 b
B) C=2b
C) C= 2 1/4 b
D) C=5b

Hi John,

First write $11 \frac14$ as an improper fraction. This is the number of cups of bananas that are shared by the 5 loaves of bread. How many cups of bananas are there in 1 loaf of bread? Write this as a relationship between b and c.


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