Here are two fractions, $\frac{2}{3}$,$\frac{7}{8}$, which of these fractions are closer to $\frac{3}{4}$? I've been throwing this question around my family. No one has a clue, therefore can someone help?
I'm pretty sure this will be easy to do 

Calculus suggestion is straight on the money: write the three fractions involved in this problem with a common denominator, say $\;24\; $:
$$\begin{align}&\frac23=\frac{16}{24}\\{}\\
&\frac78=\frac{21}{24}\\{}\\
&\color{red}{\frac34=\frac{18}{24}}\end{align}$$
Well, so which fraction is the closest one to the red one and why? Complete the reasoning.
