Multiplying Unit Fractions by Whole Numbers

To multiply a unit fraction by a whole number, write the whole number as a fraction with 1 as the denominator and then multiply.

For example, let's find the product:

4 ×

1 5

Write 4 as a fraction.
 

4

=

4 1

 

4 ×

1 5

=

4 1

×

1 5

 

To multiply fractions, multiply the numerators with each other and the denominators with each other.
 

4 1

×

1 5

=

4 × 1 1 × 5

=

4 5

 

So, the required product is

4 5

.