Writing A Mixed Number As An Improper Fraction

Improper Fractions

An Improper Fraction has a top number larger than (or equal to) the bottom number.

It is usually "top-heavy"

More Examples

3 2

7 3

16 15

15 15

100 5

See how the top number is bigger than (or equal to) the bottom number?
That makes it an Improper Fraction, (but there is nothing wrong about Improper Fractions).

Three Types of Fractions

There are three types of fraction:

Fraction Types: Proper, Improper, Mixed

Fractions

A Fraction (such as ⁷/₄ ) has two numbers:

Numerator Denominator

The top number (the Numerator) is the number of parts we have.
The bottom number (the Denominator) is the number of parts the whole is divided into.

Example: ⁷/₄ means:

We have 7 parts
Each part is a quarter ( ¹/₄ ) of a whole

So we can define the three types of fractions like this:

Proper Fractions:	The numerator is less than the denominator
Proper Fractions:	Examples: ¹/₃ , ³/₄ , ²/₇

Improper Fractions:	The numerator is greater than (or equal to) the denominator
Improper Fractions:	Examples: ⁴/₃ , ¹¹/₄ , ⁷/₇

Mixed Fractions:	A whole number and proper fraction together
Mixed Fractions:	Examples: 1 ¹/₃ , 2 ¹/₄ , 16 ²/₅

Improper Fraction

So an improper fraction is a fraction where the top number (numerator) is greater than or equal to the bottom number (denominator): it is top-heavy.

4/4
4 4

Can be Equal

What about when the numerator is equal to the denominator? For example ⁴/₄ ?

Well it is the same as a whole, but it is written as a fraction, so most people agree it is a type of improper fraction.

Improper Fractions or Mixed Fractions

We can use either an improper fraction or a mixed fraction to show the same amount.

For example 1 3 4 = 7 4 , as shown here:

Converting Improper Fractions to Mixed Fractions

To convert an improper fraction to a mixed fraction, follow these steps:

	Divide the numerator by the denominator. Write down the whole number answer Then write down any remainder above the denominator.

Example: Convert 11 4 to a mixed fraction.

Divide:

11 ÷ 4 = 2 with a remainder of 3

Write down the 2 and then write down the remainder (3) above the denominator (4).

Answer:

2 3 4

That example can be written like this:

Fraction 11/4 = 2 3/4

Example: Convert 10 3 to a mixed fraction.

Fraction 11/4 = 2 3/4

Answer:

3 1 3

Converting Mixed Fractions to Improper Fractions

To convert a mixed fraction to an improper fraction, follow these steps:

	Multiply the whole number part by the fraction's denominator. Add that to the numerator Then write the result on top of the denominator.

Example: Convert 3 2 5 to an improper fraction.

Multiply the whole number part by the denominator:

3 × 5 = 15

Add that to the numerator:

15 + 2 = 17

Then write that result above the denominator:

17 5

We can do the numerator in one go:

Fraction 2 2/5 = 17/5

Example: Convert 2 1 9 to an improper fraction.

Fraction 2 1/9 = 19/9

Are Improper Fractions Bad ?

NO, they aren't bad!

For mathematics they are actually better than mixed fractions. Because mixed fractions can be confusing when we write them in a formula: should the two parts be added or multiplied?

Mixed Fraction:	What is:	1 + 2 1 4 ?
	Is it:	1 + 2 + 1 4	= 3 1 4 ?
	Or is it:	1 + 2 × 1 4	= 1 1 2 ?

Improper Fraction:	What is:	1 + 9 4 ?
	It is:	4 4 + 9 4 = 13 4

But, for everyday use, people understand mixed fractions better.

Example: It is easier to say "I ate 2 1 4 sausages", than "I ate 9 4 sausages"

We Recommend:

For Mathematics: Improper Fractions
For Everyday Use: Mixed Fractions