# How do you write #2/5# as decimal?

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We can write this as a decimal by making the denominator 10.

It is 0.4.

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The easiest way to write this as a decimal is to multiply it until the denominator is 10. As decimals are written in a tens system (with a tenths, hundredths, thousandths, etc. place), fractions with a denominator of ten can easily be written as decimals.

The way to make the denominator ten is to multiply both the top and bottom by 10/the bottom number. In this case:

To simplify, we can multiply the two numerators and the two denominators.

When we simplify, we get:

This, in words, is four tenths. Therefore, we put four in the tenths place of the decimal.

In decimal form, this is

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Decimals are way of writing fractions which have a power of

In

Note that

However, some fractions have denominators which cannot be made into a power of

In that case, divide the numerator by the denominator to get a decimal.

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