4.5 as a Fraction

Writing 4.5 as a fraction requires us to multiply 4.5/1 by 10/10 which will result in 45/10. Reducing further we get the answer: 9/2. Because this is an improper fraction it can also be written it as a mixed number 4 1/2.

Writing 4.5 as a fraction requires us to multiply 4.5/1 by 10/10 which will result in 45/10. Simplifying further we get the final answer: 9/2.

What Is 4.5 as a Fraction?

4.5 as a fraction in lowest terms is 9/2. Quick tip: to verify the answer is correct, use a calculator to divide 9 by 2 and you should get 4.5.

How to Work Out 4.5 as a Fraction

The simple steps below will help you convert a decimal into a fraction. In this example we’ll demonstrate how to write 4.5 as a simplified fraction:

1. Turn 4.5 into a fraction dividing it by 1.
   4.5 1
2. To get rid of the decimal point, multiply the numerator and denominator by 10. Why 10? 4.5 has one digit after the decimal point, so you need to multiply by 10¹=10.
   4.5 1

   ×

   10 10

   =

   45 10
3. Divide 45 and 10 by their Greatest Common Divisor (GCD), which in this case is 5.
   45 ÷ 5 10 ÷ 5
4. In conclusion, 4.5 as a fraction in simplest form is:
   9 2
5. Since 4.5 is greater than 1, the resulting fraction is an improper fraction. For this reason we can also write 9/2 as a mixed number:
   4

   1 2