What is the lowest denominator

I think you want to reduce the fraction to the lowest terms.

Improper fraction 1 3/4 produces an improper fraction of 7/4 (1 times denominator plus numerator)

To reduce a fraction, we need to divide the numerator (number on top) and the denominator (number on the bottom) by the greatest common factor (GCF).

To get the GCF, find the factors of the numerators and denominators and find the greatest number that is in both lists.

The factors of 2 are 1, 2.

The factors of 10 are 1, 2, 5, 10.

The greatest (largest) number is both lists is 2, so we divide the numerator and denominator by 2 and get 1/5.

Good luck,

Paul

Multiplying Fractions:

1. Make sure you're working with two fractions.
2. Multiply numerator x numerator, then multiply denominator x denominator.

Dividing Fractions:

1. Make sure you're working with two fractions
2. Flip the second fraction upside down.
3. Change the division sign into a multiplication sign.
4. Multiply top x top and bottom x bottom.

Converting Mixed Numbers into Improper Fractions:

1. Convert mixed numbers into improper fractions.
2. Take the whole (non-fraction) number and multiply it by the denominator.
3. Add that answer to the numerator.
4. Put that amount over the original denominator and you will have an improper fraction.

Method for Adding and Subtracting Fractions:

1. Find the lowest common denominator (bottom number). For both adding and subtracting fractions, you'll start with the same process.
2. Multiply fractions to match the lowest common denominator.
3. Add or subtract the two numerators (top number) but NOT the denominators.

Multiply the numerators (the top numbers) and multiply the denominators (the bottom numbers).

As an example, 3/4 x 4/5 = (3 x 4)/(4 x 5) = 12/20. Now we should reduce it to lowest terms by dividing numerator and denominator by the greatest common factor. I divided the numerator and denominator by 4 and got 3/5.

Good luck.

Paul

1. Reduce fractions to lowest common denominators.
2. Multiply numerators together to find new numerator
3. Multiply denominators together to find new denominator

This answer is correct. 4/12 divided by 2/2= 1/3
The reciprocal of 2/2 is 2/2
Then you multiply straight across and reduce to get 1/3

The denominator is that number on the bottom of a fraction, so with 2 different fractions you want to get them in a form where they have the same denominator. Often you will be trying to find the lowest common denominator.

The usual procedure is to multiply one denominator into the top (numerator) of the other fraction. Then repeat this process with the denominator of the second fraction multiplied into the numerator of the first fraction. Then multiply the 2 denominators together and the result is the denominator now of both fractions.

Eg 2/3 and 5/7 become

14/21 and 15/21

Sometimes further simplification is possible where one fraction has a denominator which is a mltiple of the other. eg

2/3 and 5/6

In this case you only need to multiply on the first fraction

4/6 and 5/6

One way to solve the problem is to convert all the fractions so that they have the same common denominator, then just add them up.

12 1/6 = 73 / 6 = 292 / 24

2 3/8 = 19 / 8 = 57 / 24

7 2/3 = 23 / 3 = 184 / 24

19 3/4 = 79 / 4 = 474 / 24


Therefore:

(292 / 24) - (57 / 24) - (184 / 24) + (474 / 24) = 525 / 24 = 21 21/24 = 21 7/8

Therefore:

12 1/6 - 2 3/8 -7 2/3 + 19 3/4 = 21 7/8


Good luck, I hope that helps.

0.85714285714 + (1.2-.75) = 1.30714285714

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This might helpful: http://www.helpwithfractions.com/least-common-denominator.html > http://en.wikipedia.org/wiki/Lowest_common_denominator