How To Find Ratio: Tutorial, Examples, And More

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In this class, we going to focus on providing information about how to find ratios.

The term ratio can be described as a mathematical expressions that compare two or more quantities and numbers.

Ratio can compare absolute amounts and quantities, and can also be used to compare portions of a larger whole. Ratios can be written and calculated in fractions and in percentages.

However, the basic principles governing the use of ratios are universally the same.

Uses Of Ratios
Ratios can be used in both real world and in school settings to compare the differences between two or more quantities.

The simplest form of ratio compare only two numbers or quantities.

However, ratios can also be used to compare more than 3 quantities and numbers.

For example:

In a basket containing different types of vegetables and fruits such as spinach, apricot, cabbage, carrot, avocado, apple, and oranges. All these can be expressed in form of a ratio.

Ratio is only used when two or more numbers and quantities ar…

Division Of Fraction By Fraction: Tutorials, Examples And More

Division Of Fraction By Fraction dividing fractions examples dividing fractions calculator how to divide mixed fractions dividing fractions with whole numbers dividing fractions worksheet how to divide fractions with different denominators how to multiply fractions how to subtract fractions
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Before we jump into the division of fraction by fraction, let's look at or  understand some few basic terms, which are very important for understanding the mathematical concept of fraction:


Fraction


Fraction is a part of a whole or ratio of two numbers, the numerator, and denominator, with the numerator written above the denominator.


Numerator


The numerator infraction is the number written above the division line in a fraction as seen in the above picture.

Denominator


While denominator infraction is a number written below the division line in a fraction.


Reciprocal Number


Reciprocal simply means the opposite version of something such as come and go, sleep and wake up and so on.

In mathematics:

Reciprocal number infraction is an arithmetic expression where the denominator is taken to the top of the division line and the numerator to the bottom of the division line.

In general, reciprocal of a number is the number obtained by dividing the number with one.

Example 1: what is the reciprocal number of 2?

Answer: the reciprocal number of 2 is 1/2.

As you can see from the above example, the reciprocal number is obtained by dividing the whole number with 1.

But, this is a whole number. What if you are asked to find the reciprocal number of a fraction?

That is what  we are going to be discussing now:

Reciprocal Fraction


Reciprocal fraction is obtained by exchanging or flipping the numerator to the bottom of the fraction, and the denominator to the top of the fraction. In other words, taking numerator from above the fraction to the bottom of the fraction, and taking denominator from bottom of the fraction to the top of the fraction.

Example 2


What is the reciprocal fraction of  2/5?

Answer


The reciprocal fraction of 2/5 is 5/2.

Example 3


What is the reciprocal fraction of 42/3?

Answer


This type of fraction is called mixed fractions. Because the fraction contains a whole number and fraction combined together.


42/3

Therefore, we need to simplify the mixed fraction to fraction.

42/3 = 14/3

The above result is obtained by multiplying  4 and 3 and then adding the result with 2.

In practice,

 4× 3 = 12 + 2 = 14

Then, divide the final result with the denominator of the mixed fraction.

That is, 14/3

Now, with this solid background about fraction, let's talk about the division of fraction by fraction:


Division Of Fraction By Fraction


To divide a fraction by fraction, it simply means to find out how many times a given denominator of fraction can be found in a given numerator of fraction.

Example 4


If someone gave you 5 oranges to share between you and your sister. And the person who gave you the oranges told you to take 3 oranges and give the remaining 2 oranges to your sister.

In mathematics, this statement can be summarised as follows:

Total number of the oranges = 5
Your share in 5 oranges = 3
Your sister's share in 5 oranges = 2

Infraction,

You will have 3 out of 5 oranges
                 
                             3/5

And your sister will be having 2 out of 5 oranges,

                       2/5


Now, how many  3/5 can be found in 2/5

This means 2/5 of your sister's share divided by your own share.

That is,    2/5 ÷ 3/5

Now, to divide 2/5 3/5,  we need to first change the division sign to multiplication sign.

To do this, we need to take the reciprocal of ÷ 3/5

If you could remember, the reciprocal fraction is obtained by taking denominator of fraction to the top, and numerator of fraction to the bottom.

Therefore,

3/5 = 5/3

And also, the division sign will also change to a multiplication sign, when you take the reciprocal fraction.

Therefore,

÷3/5 = ×5/3

 When you replace ÷ 3/5  with ×5/3 in the above  fraction,

The expression  2/5 ÷ 3/5  will completely change to:

2/5 × 5/3

Then, the next thing multiply the numerators of both fractions and also multiply the denominators of both fractions.

In practice,

2/5 × 5/3

Numerators = 2× 5 = 10
Denominator = 5×3 = 15

The new fraction will look this:

New fraction = 10/ 15

But, the above expression can be simplified further. 5 can go into 10 and 15.

Therefore,

10/25 = 2/3

5 divides 10 2 times,  and divides 15 3 times.

This shows that we can find 2/3 of 3/5 is 2/5.

 Worked Example 1


Divide 4/7 by 3/4

Answer

4/7 ÷ 3/4

Take the reciprocal fraction of ÷3/4

÷ 3/4 = × 4/3

Multiply the reciprocal fraction with the given expression

That is,

4/7 ×  4/3 = 16/21


Worked Example 2


Divide 31/2 by 2/3

Answer


One of the fractions is from the given expression is mixed fraction.

So, we need to change the mixed fraction to improper or proper fractions.


Therefore,

31/2 ÷ 2/3 = 7/2 ÷ 2/3

Take the reciprocal fraction of ÷ 2/3.

  ÷ 2/3 = × 3/2

Multiply the reciprocal fraction with the given expression.

That is,

7/2 × 3/2  = 21/4

Related: Division of fraction by fraction

Conclusion

I hope this guide helps you in understanding fraction, terms commonly use infraction and how to divide fraction by fraction.

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