How to Find the Common Denominator With One Fraction & One Whole Number

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Finding the common denominator with one whole fraction will require you to write all your numbers as a fraction. Find the common denominator with one whole fraction with help from an experienced mathematics educator in this free video clip.

Part of the Video Series: Math Lessons & Tips
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Video Transcript

Hi, my name is Marija, and today I'm gonna show you how to find the common denominator of one fraction and one whole number. So for example, if you have the fraction three-fourths, and you have the whole number five, and you want to find out what is their common denominator, well first we have to write five as a fraction, and when we do that to five or any whole number, it's always gonna be over one. So that means that we're looking for the common denominator between four and one, which is four. And if you'll notice, every time you have a whole number and a fraction, the common denominator will be the denominator of the fraction, okay? Because one can go into any number. So anytime you put a whole number over one, for example if we had two-thirds and six, we're writing six as a fraction, we put it over one. So now we're looking for the common denominator between three and one, we'll again it's three because three can go into three, and one can go into three. So anytime you have a fraction and a whole number, the common denominator is always going to be the denominator of the fraction that you were given.


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