Multiply the rational expressions. Express numbers as integers or simplified fractions.

To multiply rational expressions, first make sure to factor any expressions in the numerator and denominator, if possible. For example, if you have (2x/3) * (9/4x), you multiply across the numerators and denominators: (2x * 9) / (3 * 4x) = 18x / 12x. Simplifying this gives you 3/2, as the 'x' cancels out and both the numerator and denominator can be divided by 6. Remember to always check for any common factors before multiplying, as it can simplify your calculations immensely! By canceling common factors early, you’ll make your life easier and avoid unnecessary fractions. Happy calculating!