1.8 as a Fraction

Writing 1.8 as a fraction requires us to multiply 1.8/1 by 10/10 which will result in 18/10. Reducing further we get the answer: 9/5. Because this is an improper fraction it can also be written it as a mixed number 1 4/5.

Writing 1.8 as a fraction requires us to multiply 1.8/1 by 10/10 which will result in 18/10. Simplifying further we get the final answer: 9/5.

What Is 1.8 as a Fraction?

1.8 as a fraction in lowest terms is 9/5. Quick tip: to verify the answer is correct, use a calculator to divide 9 by 5 and you should get 1.8.

How to Work Out 1.8 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 1.8 as a simplified fraction:

1. Turn 1.8 into a fraction dividing it by 1.
   1.8 1
2. To get rid of the decimal point, multiply the numerator and denominator by 10. Why 10? 1.8 has one digit after the decimal point, so you need to multiply by 10¹=10.
   1.8 1

   ×

   10 10

   =

   18 10
3. Divide 18 and 10 by their Greatest Common Divisor (GCD), which in this case is 2.
   18 ÷ 2 10 ÷ 2
4. In conclusion, 1.8 as a fraction in simplest form is:
   9 5
5. Since 1.8 is greater than 1, the resulting fraction is an improper fraction. For this reason we can also write 9/5 as a mixed number:
   1

   4 5