What is 0.4 as a fraction?

0.4 as a fraction in simplest form is written as 2/5

=
/

Calculate 0.4 as a fraction

To convert 0.4 into a fraction, here are the steps.

Any number can be written as a fraction by using 1 as the denominator. So, we converted 0.375 into a fraction with a denominator of 1.

0.4 =
0.4/1

Then, we removed the decimal part from the numerator to make it a whole number. Since 0.375 has 1 digits after the decimal point, we need to multiply both the numerator and the denominator by 10.

0.4 × 10/1 × 10
=
4/10

The next step is to make this fraction simpler because the biggest common factor (BCF) of 4 and 10 is 2. So, to simplify the fraction, we have to divide both the top and bottom numbers by 2.

4 ÷ 2/10 ÷ 2
=
2/5

That's it! The simplest form of 0.4 as a fraction is 2/5.

See Also: 2/5 as a decimal

Examples of decimal to fraction calculations