# Week 15 Blog

Adding and Subtracting Rational Expressions with Monomial Denominators

$\frac{2}{3} \div \frac{3}{4}$

Firstly, their common denominator is 12 because 3 times 4=12, so that means we need both times 3 or four for each side just for reaching the common denominator 12.

$\frac{6}{12} \div \frac{9}{12}$

so the answer is 2 over 3.