What is 1 5 called?

(iii) The fraction 1/5 is read as ”one-fifth” which means that 1 parts out of 5 equal parts in which the whole is divided. In the fraction 1/5, 1 is called the numerator and 5 is called the denominator.

math-only-math.com - Fraction | A Part of a Whole Number | Numerator | Denominator | Examples

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Fraction

A fraction is a number representing a part of a whole. The whole may be a single object or a group of objects. Consider the fraction 7/12. This fraction is read as ”seven-twelfth” which means that 7 parts out of 12 equal parts in which the whole is divided. In the fraction 7/12, 7 is called the numerator and 12 is called the denominator.

Following are some more fractions:

(i) The fraction 5/7 is read as ”five-seventh” which means that 5 parts out of 7 equal parts in which the whole is divided. In the fraction 5/7, 5 is called the numerator and 7 is called the denominator. (ii) The fraction 3/10 is read as ”three-tenth” which means that 3 parts out of 10 equal parts in which the whole is divided. In the fraction 3/10, 3 is called the numerator and 10 is called the denominator. (iii) The fraction 1/5 is read as ”one-fifth” which means that 1 parts out of 5 equal parts in which the whole is divided. In the fraction 1/5, 1 is called the numerator and 5 is called the denominator.

For example:

1. Mrs. Brown has 24 apples. She ate 1/4 of them.

(i) How many apples does she eat?

(ii) How many does she have left?

Solution:

(i) Here the fraction 1/4 means take 1 part from 4 equal parts.

So, arrange 24 apples in four equal groups.

Clearly, each group will contain 24 ÷ 4 = 6 apples.

Thus, 1/4 of 24 is 6.

Hence, Mrs. Brown ate 6 apples.

(ii) Number of left out apples = 24 – 6 = 18.

2. Andrea has a packet of 20 biscuits. She gives 1/2 of them to Andy and 1/4 of them to Sally. The rest she keeps.

(i) How many biscuits does Andy get?

(ii) How many biscuits does Sally get?

(iii) How many biscuits does Andrea keep?

Solution:

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(i) Here, 1/2 of 20 means take 1 part from two equal parts.

So, we arrange 20 biscuits in two equal parts.

Clearly, each part will contain 20 ÷ 2 = 10 biscuits.

Therefore, 1/2 of 20 is 10.

Hence, Andy gets 10 biscuits.

(ii) 1/4 of 20 means take 1 part from four equal parts.

So, we arrange 20 biscuits in four equal parts.

Clearly, each part will contain 20 ÷ 4 = 5 biscuits.

Therefore, 1/4 of 20 is 5.

Hence, Sally gets 5 biscuits.

(iii) Clearly, left out biscuits are kept by Andrea.

Therefore, Andrea keeps 20 – 10 – 5 = 5 biscuits.

3. What fraction of a day is 8 hours?

Solution:

We have,

One day = 12 hours.

Therefore, 8 hours = 8/12 of a day.

Hence, 8 hours is 8/12 part of a day.

4. Determine 2/3 of a collection of 9 balls.

Solution:

In order to find 2/3 of a collection of 9 balls, we divide the collection of 9 balls in 3 equal parts and take 2 such parts. Clearly, each row has 9/3 = 3 balls. When, we take 2 rows out of 3 rows. It represents 2/3 of 9 balls. There are 6 balls in 2 rows.