Question

When you convert feet to inches, how do you decide which portion of the conversion factor should be in the numerator and which in the denominator?

Answer 1

Answer : The conversion used is, $1\text{ feet}=12\text{ inches}$

Explanation :

The conversion used :

$1\text{ feet}=12\text{ inches}$

For example : To convert 10 feet into inches.

$1\text{ feet}=12\text{ inches}$

$10\text{ feet}=10\text{ feet}\times \frac{12\text{ inches}}{1\text{ feet}}$

                    $=120\text{ inches}$

From this we conclude that, the conversion factor used in the numerator and denominator for 1 feet should be, $\frac{12\text{ inches}}{1\text{ feet}}$