Answer
384.6k+ views
Hint: In order to convert $0.\bar 4\bar 9$ i.e., a repeating decimal into a fraction, we will consider $x = 0.494949 \ldots $. Then, multiply it with $10$ and $1000$ respectively. So, we will get two equations, where we will subtract the equation $\left( 1 \right)$ from $\left( 2 \right)$. And, by evaluating it we will determine the required fraction.
Complete step by step solution:
Now, we want to convert $0.\bar 4\bar 9$ into a fraction.
We know that the repeating decimals are called rational numbers. Thus, it can be converted into the fraction form.
Let $x = 0.494949 \ldots $
Let us multiply and divide by $10$, we have,
$x = 0.494949 \ldots \times \dfrac{{10}}{{10}}$
$x = \dfrac{{4.9494 \ldots }}{{10}}$
$10x = 4.9494 \ldots $ $ \to \left( 1 \right)$
Now, let us multiply and divide by $1000$, we have,
$x = 0.494949 \ldots \times \dfrac{{1000}}{{1000}}$
$x = \dfrac{{494.9494 \ldots }}{{1000}}$
$1000x = 494.9494 \ldots $ $ \to \left( 2 \right)$
Now, subtract equation $\left( 1 \right)$ from $\left( 2 \right)$, we have,
$1000x - 10x = 494.9494 \ldots - 4.9494 \ldots $
$990x = 490$
$x = \dfrac{{490}}{{990}} = \dfrac{{49}}{{99}}$
Hence, the value of $0.\bar 4\bar 9$in terms of fraction is $\dfrac{{49}}{{99}}$.
Note: Repeating decimals are those numbers which keep on repeating the same value after decimal point. These numbers are also known as Recurring numbers. The common definition of rational number that is known is that any number that can be written in fraction form is a rational number.
Here we have multiplied and divided $0.\bar 4\bar 9$ by $10$ and $1000$ respectively, then subtracted both the equations to determine the value of $x$ as in this question we have a repetition of $49$ in $0.\bar 4\bar 9$. Normally, to convert a decimal to a fraction, place the decimal number over its place value. For example, if we have $0.4$, the $4$ is in the tenth place, so we place $4$ over $10$ to create the equivalent fraction, i.e., by multiply and dividing by $10$, we have $\dfrac{4}{{10}}$. If we have two numbers after the decimal point, then we use $100$, if there are three then we use $1000$, etc.
Complete step by step solution:
Now, we want to convert $0.\bar 4\bar 9$ into a fraction.
We know that the repeating decimals are called rational numbers. Thus, it can be converted into the fraction form.
Let $x = 0.494949 \ldots $
Let us multiply and divide by $10$, we have,
$x = 0.494949 \ldots \times \dfrac{{10}}{{10}}$
$x = \dfrac{{4.9494 \ldots }}{{10}}$
$10x = 4.9494 \ldots $ $ \to \left( 1 \right)$
Now, let us multiply and divide by $1000$, we have,
$x = 0.494949 \ldots \times \dfrac{{1000}}{{1000}}$
$x = \dfrac{{494.9494 \ldots }}{{1000}}$
$1000x = 494.9494 \ldots $ $ \to \left( 2 \right)$
Now, subtract equation $\left( 1 \right)$ from $\left( 2 \right)$, we have,
$1000x - 10x = 494.9494 \ldots - 4.9494 \ldots $
$990x = 490$
$x = \dfrac{{490}}{{990}} = \dfrac{{49}}{{99}}$
Hence, the value of $0.\bar 4\bar 9$in terms of fraction is $\dfrac{{49}}{{99}}$.
Note: Repeating decimals are those numbers which keep on repeating the same value after decimal point. These numbers are also known as Recurring numbers. The common definition of rational number that is known is that any number that can be written in fraction form is a rational number.
Here we have multiplied and divided $0.\bar 4\bar 9$ by $10$ and $1000$ respectively, then subtracted both the equations to determine the value of $x$ as in this question we have a repetition of $49$ in $0.\bar 4\bar 9$. Normally, to convert a decimal to a fraction, place the decimal number over its place value. For example, if we have $0.4$, the $4$ is in the tenth place, so we place $4$ over $10$ to create the equivalent fraction, i.e., by multiply and dividing by $10$, we have $\dfrac{4}{{10}}$. If we have two numbers after the decimal point, then we use $100$, if there are three then we use $1000$, etc.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)