Question

Robin used one fourth of a pound of butter to make a cake. Before she started she seven eighths of a pound of butter. How much butter did robin have when she was done baking? Give your answer as a fraction of a pound

Answer 1

Answer:

$\dfrac{5}{8}$ pounds.

Step-by-step explanation:

To find how much butter Robin had after baking, we first need to find how much she initially had.

According to the problem Robin had 7/8 of a pound of butter.

She used 1/4 of a pound of butter to make a cake.

This gives us:

$\dfrac{7}{8}-\dfrac{1}{4})$

Since we have different denominators, we need to first find the LCD of the fractions.

$\dfrac{7}{8}-\dfrac{1}{4}(\dfrac{2}{2}$

$\dfrac{7}{8}-\dfrac{2}{8}$

Now that they have the same denominators, we can then subtract them directly.

$\dfrac{5}{8}$ pounds.