How to Move Something From a Numerator to a Denominator

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The Laws of Reciprocating Fractions....5

Moving something from a numerator to a denominator isn't as simple as just making the switch. Learn how to move something from a numerator to a denominator with help from an experienced teacher and tutor in this free video clip.

Part of the Video Series: Fractions & Percentages
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Video Transcript

Hi I'm Beth. I'm a math teacher and I'm going to show you how to change something in the numerator into the denominator. How can we move something that we find in the numerator into the denominator. This requires understanding reciprocals. Reciprocal. The reciprocal of x is one over x. Because when you multiply them together you get one. That's how that works. So if you were to have say x in the numerator of a fraction and x over four equals two, we could use this reciprocal one over x and of course if we multiply it on one side of the equation, we must make it equal by multiplying on the other side of the equation, then what we get is that the x over here cancels out, but our x ends up in the denominator on the other side. So this is not the most efficient way to solve this problem, but it is a very clear use of it has very clear uses when we do more complicated problems. So if you have a complicated problems, so if you have a complicated problem where you want to move something in the numerator into the denominator, multiply is by its reciprocal. I'm Beth and that's how you deal with changing fractions and shaking your shoulders. Have fun.

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