IXL | Divide fractions by whole numbers in recipes

What quantity of baking powder would you need to make a third of the original recipe?

Banana cake

INGREDIENTS:

cups sugar

cups flour

cup mashed bananas

1 cup milk

cup vegetable oil

3 teaspoons vanilla

1 teaspoon cinnamon

teaspoon baking powder

2 eggs

Simplify your answer and write it as a fraction or as a whole or mixed number.

teaspoons

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Learn with an example

question

What quantity of raspberry puree would you need to make a third of the original recipe?

Very berry punch

INGREDIENTS:

cups cranberry juice

8 cups blueberry juice

cup raspberry puree

cups cherry soda

1 cup fresh blackberries

cup fresh strawberries

Simplify your answer and write it as a fraction or as a whole or mixed number.

cups

solution

The recipe calls for

of a cup of raspberry puree. To make a third of the original recipe, divide this amount by 3.

Write 3 as an improper fraction.

Turn this from a division problem into a multiplication problem by multiplying by the reciprocal.

Now multiply.

You would need

of a cup of raspberry puree.

Looking for more? Try these:

Lesson: Dividing fractions by whole numbers

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M.3Divide whole numbers and unit fractions

Lesson: Dividing fractions by whole numbers

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