Question

the cafe where you work just ran out of coffee, and you are at the store to buy 1 1/2 pounds of coffee. you have put a can with 3/4 pound of coffee into your shopping cart. how many more pounds of coffee do you need?

o 1/2

o 3/2

o 3/4

o 3/6

o 2 1/4

Explanation:

Step1: Convert mixed - number to improper fraction

The amount of coffee needed is $1\frac{1}{2}=\frac{1\times2 + 1}{2}=\frac{3}{2}$ pounds, and the amount in the cart is $\frac{3}{4}$ pounds.

Step2: Subtract the amount in the cart from the total needed

We calculate $\frac{3}{2}-\frac{3}{4}$. First, find a common denominator, which is 4. So $\frac{3}{2}=\frac{3\times2}{2\times2}=\frac{6}{4}$. Then $\frac{6}{4}-\frac{3}{4}=\frac{6 - 3}{4}=\frac{3}{4}$.

Answer:

C. $\frac{3}{4}$