Question

in a city 7/20 of the population are women and 1/4 are children. find the fraction of the population of men
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Answer 1

Answer:

2/5

Step-by-step explanation:

In fractions,

Population of men+population of women+population of children=1.

Therefore, population of men can be expressed as:-

1-([7/20]+[1/4])

[20-(7+5)]/20

[20-12]/20

8/20

=2/5

Answer 2

Concept:

A fraction represents a part of the whole. The top number is called the numerator and the below number is called the denominator.

Given:

The population of women = 7/20

The population of children = 1/4

Find:

We have to find the fraction of population of men.

Solution:

Let the total population of the city be 1.

So, we can write

The population of men + population of women + population of children = total population

Population of men  + 7/20 + 1/4 = 1

Population of men = 1 - 7/20 - 1/4

Now, make the denominator equal in the above equation

Population of men = 20/20 - 7/20 - 5/ 20

Population of men = (20 - 7 - 5)/20

Population of men = 8/20

Population of men = 2/5

Hence, the population of men in the city is 2/5.

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