Algebrarules.com

The most useful rules of basic algebra,
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Howdy! Here are a few very handy rules of algebra. These basic rules are useful for everything from figuring out your gas mileage to acing your next math test — or even solving equations from the far reaches of theoretical physics. Happy calculating!

Algebra Rule 2

To multiply a fraction with another value, multiply the numerator

$$a\left({b \over c}\right) = {ab \over c}$$
Description:

Any multiplication or division of the numerator of a fraction applies to the fraction as a whole, and vice versa: if you need to multiply a fraction, multiply the numerator and your aim is achieved

$$6\left({1 \over 3}\right) = 2 = {(6*1) \over 3}$$
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