How do you multiply fractions?

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Prepare for the CSET Multiple Subjects Subtest 2. Dive into math and science with flashcards and multiple choice questions, each question offering hints and explanations. Gear up for your success!

Multiple Choice

How do you multiply fractions?

Explanation:
To multiply fractions, multiply the top numbers together and multiply the bottom numbers together. In formula form, (a/b) × (c/d) = (ac) / (bd). After multiplying, you can simplify by canceling common factors if possible. For example, (2/3) × (4/5) = (2×4)/(3×5) = 8/15, which is already in simplest form. You can often reduce earlier by crossing factors before multiplying, like (3/4) × (8/9) → cancel 3 with 9 to get (1/4) × (8/3) = 8/12 = 2/3. The other methods—finding a common denominator, cross-multiplying, or subtracting numerators—are not used for multiplying fractions; they apply to addition/subtraction or solving proportions.

To multiply fractions, multiply the top numbers together and multiply the bottom numbers together. In formula form, (a/b) × (c/d) = (ac) / (bd). After multiplying, you can simplify by canceling common factors if possible. For example, (2/3) × (4/5) = (2×4)/(3×5) = 8/15, which is already in simplest form. You can often reduce earlier by crossing factors before multiplying, like (3/4) × (8/9) → cancel 3 with 9 to get (1/4) × (8/3) = 8/12 = 2/3. The other methods—finding a common denominator, cross-multiplying, or subtracting numerators—are not used for multiplying fractions; they apply to addition/subtraction or solving proportions.

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