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How would find 12/16 of 640?

2 years ago

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17 Replies

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3183 views

F

Francisco Lakin


17 Answers

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Hi Francisco. You should divide 640 by 16, and then multiply it by 12. This gives you 480!

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Laiba Attar

The number 1 rule to remember when finding fraction of amounts is '' Divide by the bottom, times by the top''.

So in this case you would do 640/16 = 40, and then 'times by the top' so 40 x 12= 480.

A
Adrine Andreasian

The best way to approach this question is to find 1/16 of 640. This can be done by dividing 640 by 16 -which gives us the answer of 40.

By spotting that 1/16 multiplied by 12 gives 12/16, we must also multiply 40 by 12- which gives us an answer of 480.

Therefore 12/16 of 640 is 480.

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Whole number: 640 divide it by the denominator: 16 then take my answer and multiply it by the numerator: 12.


640/ 16 = 40

40 x 12 = 480

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Shilpa R Profile Picture
Shilpa R Verified Sherpa Tutor ✓

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Hi Francisco,

In order to find 12/16 of 640 we need to know that (of) means (X) that is multiplication that is 12/16 X 640

So, first if you see the fraction 12/16 then you will see that both 12/16 are even numbers that means they can be reduced or simplified.

So, we will first reduce 12/16 by dividing the numerator and denominator by 4 which leads to 3/4.

Now the sum stands as 3/4 X 640

There are two ways to solve it

1) You do 3 X 640 = 1920 then divide by 4 which gives 480

2) You divide 640 by 4 first which gives 160 then you multiply by 3 = 480



I would recommend the second way to do the sum as this is a quicker method with less errors.

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Lindsey P Profile Picture
Lindsey P Verified Sherpa Tutor ✓

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First of all you need to find 1/16 of 640. You can do this by calculating 640/16 = 40. So 1/16 of 640 is 40.


You need 12 of these so next calculate 40x12 = 120.


Therefore 12/16 of 640 is 120.

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Dawn M

First of all simplify the fraction, 12/16 by dividing the numerator and denominator by 4 to 3/4. Then find 1/4 of 640 by dividing 640 by 4 to get 160. Now to get 3/4, multiply the result by 3, 160 x 3 = 480.

S
Sophia X

12/16 of 640 is same as 3/4 of 640 is same as 3 x 1/4 of 640= 3 x 160=480

A
Abged Siddig

The easiest way to find a fraction of a number is to divide the number by the denominator, and then multiply by the numerator. So, in this case, 640/12 would give you 40. Then, 40 * 12 = 480. Hope this makes sense! :)

J
John Rajnath

First simplify 12/16 to 3/4 (12/16 to 6/8 to 3/4)

We can find 1/4 of 640 (dividing by 4) which is 160.

So 3 quarters will be 3 lots 160 which is 480


S
Suzzie Ukpong

12 /16 X 640= 12X640/16

=7680/16

=480

N
Natasha Cornell

12/16 can be made into a nicer fraction by dividing both parts by 4 to give 3/4. Depending if on paper or using a calculator you could convert the fraction to a decimal 3/4 = 0.75 and do 640 x 0.75 (calculator). Or on paper 640 divided by 4, then multiply by 3.

S
Sonia Altaf

When finding fractions of amounts there is a simple rule to remember, divide by the denominator and multiply by the numerator. For this example, first divide 640 by 16 which gives an answer of 40. Then multiply 40 by 12, this gives 480 which is the final answer !

Christina R Profile Picture
Christina R Verified Sherpa Tutor ✓

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Find 1/16 of 640 first by dividing 640 by 16 which is 40.

Then to find 12/16 of 640, multiply 40 by 12, which is 480.

12/16 of 640 = 480

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A
Amy Crooks

You can change the fraction into 3/4 (as 4 is the GCF of 12 and 16) - this is to make it easier to work it out

Then you would divide 640 by 4 to get 160

Then you multiply the 160 by 3 to get 480


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