Skip Navigation
You are viewing an older version of this Concept. Go to the latest version.

Multiplication of Whole Numbers by Fractions

Fraction multiplier, whole number multiplicand

Atoms Practice
Estimated5 minsto complete
Practice Multiplication of Whole Numbers by Fractions
This indicates how strong in your memory this concept is
Estimated5 minsto complete
Practice Now
Turn In
Multiplication of Whole Numbers by Fractions

Remember Julie and the rainforest dilemma from the Multiply Fractions by Whole Numbers Concept? Well, in that problem Julie began by looking at the fraction of rainfall.Then she multiplied that fraction by the number of days.

What if we worked the other way around?

We could do it that way too. We could start with the number of days in the week and multiply the number of days, a whole number, by the fraction of rainfall.

To do this, you will need to know how to multiply whole numbers with fractions. This Concept will teach you how to do this.


Previously we worked multiplying fractions by whole numbers, now we can also reverse the order too and multiply whole numbers by fractions.

\begin{align*}9 \times \frac{1}{3}\end{align*}

To work through this problem we do the same thing that we did when the numbers were reversed. We can turn 9 into a fraction over one and multiply across.

\begin{align*}\frac{9}{1} \times \frac{1}{3} = \frac{9}{3}\end{align*}

Here we have an improper fraction. We can turn this into a mixed number, or in this case a whole number. Nine divided by three is three.

Our answer is 3.

Try a few of these on your own. Be sure to simplify your answer.

Example A

\begin{align*}6 \times \frac{1}{3} = \underline{\;\;\;\;\;\;\;}\end{align*}


Example B

\begin{align*}8 \times \frac{1}{2} = \underline{\;\;\;\;\;\;\;}\end{align*}


Example C

\begin{align*}10 \times \frac{1}{2} = \underline{\;\;\;\;\;\;\;}\end{align*}


Now let's think about the rainforest problem.

Today, Julie is working on the part of the project that has to do with rainfall. The rainforest gets an average of \begin{align*}\frac{1}{8}''\end{align*} of rain each day. Some days there isn’t any rain, but most days there is some. The \begin{align*}\frac{1}{8}''\end{align*} average seems to make the most sense.

Imagine that Julie wants to figure out how much rainfall there will be in 30 days. This is the whole number that she will multiply with the amount of rainfall in one day.

We can multiply 30 times \begin{align*}\frac{1}{8}''\end{align*} to get the total inches of rain.

\begin{align*}30 \times \frac{1}{8} = \underline{\;\;\;\;\;\;\;}\end{align*}

Now we multiply just as we would any whole number and fraction.

\begin{align*} \frac{30}{8} = 3 \frac{6}{8} = 3 \frac{3}{4}\end{align*}

This is our answer in simplest form.


a shortcut for repeated addition
means multiply in a word problem
the answer to a multiplication problem
to find a reasonable answer that is not exact but is close to the actual answer.

Guided Practice

Here is one for you to try on your own.

\begin{align*}6 \times \frac{2}{3} = \underline{\;\;\;\;\;\;\;}\end{align*}


Here we multiply the whole number and the fraction.

\begin{align*} \frac{12}{3} = 4\end{align*}

This is our answer in simplest form.

Video Review

Multiplying Fractions and Whole Numbers


Directions: Multiply the following fractions and whole numbers. Be sure that your answer is in simplest form.

1. \begin{align*}9 \times \frac{2}{3} = \underline{\;\;\;\;\;\;\;}\end{align*}

2. \begin{align*}6 \times \frac{2}{3} = \underline{\;\;\;\;\;\;\;}\end{align*}

3. \begin{align*}5 \times \frac{2}{5} = \underline{\;\;\;\;\;\;\;}\end{align*}

4. \begin{align*}\frac{1}{2} \times 9 = \underline{\;\;\;\;\;\;\;}\end{align*}

5. \begin{align*}\frac{2}{7} \times 9 = \underline{\;\;\;\;\;\;\;}\end{align*}

6. \begin{align*}\frac{1}{3} \times 7 = \underline{\;\;\;\;\;\;\;}\end{align*}

7. \begin{align*}\frac{3}{4} \times 10 = \underline{\;\;\;\;\;\;\;}\end{align*}

8. \begin{align*}\frac{3}{4} \times 12 = \underline{\;\;\;\;\;\;\;}\end{align*}

9. \begin{align*}\frac{3}{5} \times 10 = \underline{\;\;\;\;\;\;\;}\end{align*}

10. \begin{align*}\frac{1}{9} \times 36 = \underline{\;\;\;\;\;\;\;}\end{align*}

11. \begin{align*}\frac{1}{9} \times 63 = \underline{\;\;\;\;\;\;\;}\end{align*}

12. \begin{align*}\frac{1}{2} \ of \ 14 = \underline{\;\;\;\;\;\;\;}\end{align*}

13. \begin{align*}\frac{1}{2} \ of \ 24 = \underline{\;\;\;\;\;\;\;}\end{align*}

14. \begin{align*}\frac{1}{4} \ of \ 44 = \underline{\;\;\;\;\;\;\;}\end{align*}

15. \begin{align*}\frac{1}{5} \ of \ 35 = \underline{\;\;\;\;\;\;\;}\end{align*}

16. \begin{align*}\frac{1}{8} \ of \ 40 = \underline{\;\;\;\;\;\;\;}\end{align*}

Notes/Highlights Having trouble? Report an issue.

Color Highlighted Text Notes
Show More


Estimate To estimate is to find an approximate answer that is reasonable or makes sense given the problem.
multiplication Multiplication is a simplified form of repeated addition. Multiplication is used to determine the result of adding a term to itself a specified number of times.
Product The product is the result after two amounts have been multiplied.

Image Attributions

Explore More

Sign in to explore more, including practice questions and solutions for Multiplication of Whole Numbers by Fractions.
Please wait...
Please wait...