Find common denominators, Mathematics

Q. Find Common Denominators?

What does it mean?

Say you have two fractions, like

1/3 and 8/21

And they have different denominators (3 and 21). Sometimes, you'd prefer that the denominators be the same. It's possible to rewrite these fractions so that the denominators are the same-this is called finding common denominators. Read on to find out how!

2. How do you do it?

Let's use these two fractions for an example:

1/3 and 8/21

Step 1. Factor the denominators.

1/3 and 8/3.7

Step 2. Notice what the differences are. The one on the left had just a single factor, 3. The one on the right has two factors, 3 and 7.

Step 3. Figure out what extra factors are needed to make the denominators equal. If the left-hand denominator had a factor of 7, then they would be equal.

Step 4. Put in the extra factors. (Be sure to put them both in the numerator and denominator!) Here, we'll put the extra 7 factor in the left hand fraction, both top and bottom:

1.7/3.7 and 8/ 3.7

(Tip: It is important to realize that multiplying both the top and bottom by 7 doesn't change the value of the fraction.

You're done! The denominators are the same! You can multiply out if you want:

7/21 and 8/21

Posted Date: 5/4/2013 1:55:46 AM | Location : United States







Related Discussions:- Find common denominators, Assignment Help, Ask Question on Find common denominators, Get Answer, Expert's Help, Find common denominators Discussions

Write discussion on Find common denominators
Your posts are moderated
Related Questions
construct the green''s function that satisfies dG''''-(2x+1)G''+(x+1)G=delta(x-s), G(0,s)=G(1,s)=0

solve a trader purchases coffee at the rate of Rs. 350 per kg and mixes it with chicory bought at the rate of Rs.750 per kg in the ratio 5:2.If he sells the mixture at the rate of

Ray cut 6 pieces of rope . Each piece was between 67 and 84 inches long. What would be the total length of the 6 pieces of rope?

Please,I Want to know and study for stability on predictor -corrector for numerical integration method

There are 20 defective bulbs in a box of 100 bulbs.if 10bulbs are choosen at random then what is the probability of there are just 3defective bulbs


to which subset of the real number does the number 22 belong?

how much it cost an hour

which experession can be used to check the quotient 646 divided by 3

1. The polynomial G(x) = -0.006x4 + 0.140x3 - 0.53x2 + 1.79x measures the concentration of a dye in the bloodstream x seconds after it is injected. Does the concentration increase