One third, One-third, or One-thirds

How to spell a fraction like 1/3 in English? It should be one-third, one-thirds, one third, or a third? The fraction takes singular or plural verbs in a sentence? If you want to know the answers to all of these questions, just keep reading on to get the details and our explanations.



If we give you the fraction of 1/3, how do you spell this number? It’s one-third, one third, or one-thirds? Which is the correct way to write and pronounce this fraction? Well, if you haven’t been sure about the answer to this question, don’t worry. Just be here with us and we will provide you with basic rules of how to write and pronounce fractions in English so that you will know if it’s one third, one-third, or one-thirds.

In addition, we will also let you know whether 1/3takes plural or singular verbs; and other ways to say spell this fraction in English. Now, do you find the topic of our today’s article interesting and want to jump into the further details right away? If that’s the case, let’s get started right now!

General rules of spelling fractions in English

First to say, it’s quite important for learners of English to be able to spell out and pronounce all types of numbers in English, including fractions as well. But if you feel confused when it comes to expressing fractionsorally and alphabetically, then you should at least take a look at some basic rules of spelling fractions as follows:

1. Always use cardinal numbers (one, two, three, …) to write the numerator of a fraction and use ordinal numbers (third, fourth, fifth, …) to write the denominator of a fraction.

For example: 2/5 = two-fifths; 3/4 = three-fourths; 5/9 = five/ninths

2. Adding -s to the denominator as a suffix if the numerator is higher than 1.

For example: 1/5 = one-fifth; 2/5 = two-fifths

3. Hyphenate all spelled-out fractions; except for fractions containing digits higher than 20 in the numerator and/or the denominator. We also don’t need to hyphenate the fractions introduced with a or an.

For example: 21/31 = twenty-one thirty-firsts, 17/200 = seventeen two-hundredths

1/2 = a half; 1/4 = a quarter; 1/5 = a fifth; 1/8 = an eighth

One third vs one-third vs one-thirds

Apply the general rules of writing fractions in English mentioned above, you yourself know that one-third is the most proper way to spell the fraction 1/3.

For example:

He ate one-third of a large pizza -- Correct

He ate one-thirds of a large pizza -- Incorrect

He ate one third of a large pizza -- Not completely correct

Despite the fact that the way of spelling 1/3 as one third in the example above is not completely correct, it may be also acceptable in modern English.

Do fractions (like one-third) take plural or singular verbs?

Well, fractions that go with countable nouns take either plural or singular verbs. Everything depends on the subject of the sentence.

• If the fractions modify singular nouns, they take singular verbs.

For example: A third of the cake has been eaten

• If the fractions modify plural nouns, they take plural verbs.

For example: Two-thirds of the trees are planted.

• If the fractions modify a collective noun, they can take either plural or singular.

For example:

A half of the team were leaving.

A half of the team was leaving.

Note: Fractions that go with uncountable nouns always take singular.

One third synonym

Along with the way wespell 1/3 as one-third, there are some other ways to write and pronounce this fraction. And they are:

- One divided by three

- One over three

- A third

- Tierce

Similarly, two-thirds, two divided by three, and two over three are 3 different ways to spell the fraction 2/3. Now, do you know how to pronounce a fraction in different ways? Let’s try spelling other fractions like 3/7, 5/9, 3/8, or whatever you want in different ways on your own!

Wrap up

Now, you completely understand the general rules of how to write and pronounce a fraction in English;and you also no longer wonder whether 1/3 should be spelled as one third, one-third, or one-thirds, right? Besides, we also introduce you the basic rules of subject-verb agreement in a sentence that its subject includes a fraction. Do you find them helpful? And in the last part of this writing, you also get 2 more ways of spelling fractions in the English language.

For some last words, we just wish that the knowledge and information in this writing are useful and interesting to you! Also, don’t forget to practice as much as possibleso that you will totally master all of the rules we listed above.

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