# Find out the values of following mathematical expressions :

20% of 400 kg

36% of 825 km

$33\dfrac{1}{3}$% of 66 boxes

100% of 28.80

Last updated date: 29th Mar 2023

•

Total views: 307.5k

•

Views today: 3.85k

Answer

Verified

307.5k+ views

Hint: Here we will perform basic operations of multiplication, division and also use the formula of percentage to solve the question.

Complete step-by-step answer:

Now, multiplication is used to multiply two or more numbers, digits etc. It is denoted by x and in the commonly used language ‘of’ is written for multiplication. Also, the concept of percentage is used. Percentage is denoted by the sign %. Percentage is a number or ratio expressed as a fraction of 100. In other words, percentage means division by 100. Example is 45% which is equal to $\dfrac{{45}}{{100}}$ or 0.45.

Now, according to the question 20% of 400 kg can be written as,

$ \Rightarrow $20% of 400 kg = \[\dfrac{{20}}{{100}}\] x 400 kg = 80 kg

36% of 825 km can be written as,

$ \Rightarrow $36% of 825 km = $\dfrac{{36}}{{100}}$ x 825 km = 297 km

$33\dfrac{1}{3}$ is to be converted in simple form. So, $33\dfrac{1}{3}$ can be written as $\dfrac{{100}}{3}$. So, $33\dfrac{1}{3}$% of 66 boxes can be written as,

$ \Rightarrow $$33\dfrac{1}{3}$% x 66 boxes = $\dfrac{{100}}{3}$% x 66 boxes = $\dfrac{{100}}{3}\left( {\dfrac{1}{{100}}} \right)$ x 66 boxes = 22 boxes

100% of 28.80 can be written as, 1 of 28.80 because \[\dfrac{{100}}{{100}}\] = 1, so 100% of 28.80 can be written as,

$ \Rightarrow $100% of 28.80 = $\dfrac{{100}}{{100}}$ x 28.80 = 28.80

So, 20% of 400 kg = 80 kg

36% of 825 km = 297 km

$33\dfrac{1}{3}$% of 66 boxes = 22 boxes

100% of 28.80 = 28.80

Note: In such types of easy questions, it is important that no calculation error should be done. You have to take care that the calculation is done properly. Calculation errors are the main error in such types of problems. Also, keep in mind that the formula of percentage is also very important.

Complete step-by-step answer:

Now, multiplication is used to multiply two or more numbers, digits etc. It is denoted by x and in the commonly used language ‘of’ is written for multiplication. Also, the concept of percentage is used. Percentage is denoted by the sign %. Percentage is a number or ratio expressed as a fraction of 100. In other words, percentage means division by 100. Example is 45% which is equal to $\dfrac{{45}}{{100}}$ or 0.45.

Now, according to the question 20% of 400 kg can be written as,

$ \Rightarrow $20% of 400 kg = \[\dfrac{{20}}{{100}}\] x 400 kg = 80 kg

36% of 825 km can be written as,

$ \Rightarrow $36% of 825 km = $\dfrac{{36}}{{100}}$ x 825 km = 297 km

$33\dfrac{1}{3}$ is to be converted in simple form. So, $33\dfrac{1}{3}$ can be written as $\dfrac{{100}}{3}$. So, $33\dfrac{1}{3}$% of 66 boxes can be written as,

$ \Rightarrow $$33\dfrac{1}{3}$% x 66 boxes = $\dfrac{{100}}{3}$% x 66 boxes = $\dfrac{{100}}{3}\left( {\dfrac{1}{{100}}} \right)$ x 66 boxes = 22 boxes

100% of 28.80 can be written as, 1 of 28.80 because \[\dfrac{{100}}{{100}}\] = 1, so 100% of 28.80 can be written as,

$ \Rightarrow $100% of 28.80 = $\dfrac{{100}}{{100}}$ x 28.80 = 28.80

So, 20% of 400 kg = 80 kg

36% of 825 km = 297 km

$33\dfrac{1}{3}$% of 66 boxes = 22 boxes

100% of 28.80 = 28.80

Note: In such types of easy questions, it is important that no calculation error should be done. You have to take care that the calculation is done properly. Calculation errors are the main error in such types of problems. Also, keep in mind that the formula of percentage is also very important.

Recently Updated Pages

If abc are pthqth and rth terms of a GP then left fraccb class 11 maths JEE_Main

If the pthqth and rth term of a GP are abc respectively class 11 maths JEE_Main

If abcdare any four consecutive coefficients of any class 11 maths JEE_Main

If A1A2 are the two AMs between two numbers a and b class 11 maths JEE_Main

If pthqthrth and sth terms of an AP be in GP then p class 11 maths JEE_Main

One root of the equation cos x x + frac12 0 lies in class 11 maths JEE_Main

Trending doubts

What was the capital of Kanishka A Mathura B Purushapura class 7 social studies CBSE

Difference Between Plant Cell and Animal Cell

Write an application to the principal requesting five class 10 english CBSE

Ray optics is valid when characteristic dimensions class 12 physics CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

Tropic of Cancer passes through how many states? Name them.

Write the 6 fundamental rights of India and explain in detail

Write a letter to the principal requesting him to grant class 10 english CBSE

Name the Largest and the Smallest Cell in the Human Body ?