Question

one fifth of a number is 20 less than the number find the number

Answer 1

let the number be x
$(x \div 5) = x - 20 \\ x = 5x - 100 \\ 4x = 100 \\ x = 25$
therefore number is 25
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Answer 2

Concept:

Fraction is the numerical representation of numbers in the form of Numerator and Denominator.

Given:

One-fifth of a number is 20 less than the number.

Find:

We are asked to find the number.

Solution:

We have,

One-fifth of a number is 20 less than the number.

Now,

Let, the number = y

So,

According to the question,

One-fifth of a number is 20 less than the number.

i.e.

(1/5) × y = y - 20

On solving we get,

y = 5y - 100

Now,

We can rewrite,

5y - y = 100

4y = 100

i.e.

y = 25

So,

The number is 25.

Hence, we can say that the number is 25.

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