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# Visually dividing unit fraction by a whole number

Learn how to divide fractions by whole numbers. You'll watch how dividing a fraction into smaller parts changes the denominator. Then, you'll practice this concept with examples to understand how dividing fractions works.

## Want to join the conversation?

• i cant understand the topic
• To divide a unit fraction by a whole number:

1) Write 1 in the numerator.

2) Write the product of the unit fraction’s denominator and the whole number, for the new denominator.

Example: let’s divide 1/5 by 8.

The numerator is 1.
The new denominator is 5 x 8 = 40.

Have a blessed, wonderful day!
• How would you show it on a number line, though?
• you take the reciprocal of 3/1 which is 1/3 and then you would do 1/3 x 1/5 and get 1/15 and then you take the denominator and put the denominator as the total number of points and split it into 3 groups of 5.
• How I do it is like this. For example 1/5 divided by 7. First write it down. 1/5 divided by 7. then you multiply by making the 7 a fraction like this. 1/5 divided by 1/7. Now just multiply 5 times 7. witch is 35. then just write the 1 on top of the 35. or just write the 1 first like this 1/35 and that is how you do it!
• Did you just type in division instead of multiplication? That’s a very bad mistake, and is little bit rare. Cause 1/5 divided by 1/7 is 7/5. To divide 1/5 divided by 7, you keep the dividend aka the one you’re going to divide, change the division symbol to multiplication, and flip the fraction. Since 7 can be written into 7/1, the reciprocal of 7 is 1/7. So you’re now onto 1/5 times 1/7. The rule of multiplying fractions is to multiply the numerators together and multiply the denominators together. 1 times 1 is 1 and for third graders, 5 times 7 is 35 because (5 times 5) plus (5 times 2) is 25 plus 10 which is 35. So the quotient which you correctly stated, is 1/35.
• Can you help me see why it's not 3/15? 1/5 divided by 3 equals logically 3 1/15ths. Why are we saying 1/15th I have autism and this is why I asking. Thanks!
• In fraction division (fraction divided by whole number) you have to leave the numerator untouched. You just go to the denominator. So if it is 1/4 (1 fourth) divided by 6 you MULTIPLY 4 and 6 (24) you just put 24 as the denominator and 1 as the numerator. If it is 5\9 (five-ninths) divided by 8 you MULTIPLY 8 and 9 (72) you put that as the denominator and leave the numerator the same(5) the answer would then be 5\72(five-seventytwoths) get it?
• This topic I find to be easy. But I have a harder time when it deals with bigger fractions like 75/1000. I need help with thos fractions.
• I see 4/28 is 1/28 a simplified fraction?
• This makes more sense now
• I understand that the pattern is to multiply the unit fractions with the whole number to approximate the correct answer. I don't understand the visuals explaining it though. I feel like I'm missing a key concept.