Rule: When we multiply fractions, we multiply the numerators together and the denominators together. In algebraic terms, (x/y) x (a/b) = (xa)/(yb) And why is this? We are designating one of the fractions as the "whole" and cutting out a piece of it (the other fraction). So 1/2 x 3/4 is half of 3/4, and 2/3 x 1/5 is 2/3 of 1/5. In other words, when we multiply any two fractions together, the equals sign can be read as "OF." 4. Practice First, have them try their hand at a few simple written problems. Then, today or the next class period, make a simple recipe that doesn't require an oven, such as rice crispie treats. Cut the recipe in half or some other fraction, and work out the amounts before mixing ingredients. Enjoy! Homework is a must! Include both written problems, such as: