How to Multiply Fractions With Common Denominators

Multiplying fractions requires separately multiplying the numerators and then the denominators.
••• Numbers image by paul hampton from Fotolia.com

Multiplying fractions is essentially taking a fraction of a fraction. As an example, multiplying 1/2 times 1/2 is the same as taking a half of a half, which you might already know to be a quarter, or 1/4. Multiplication of fractions do not require the same denominator, or the bottom number of the fraction, like addition and subtraction does. Instead, you would simply multiply the denominators and the top numerators.

    Write out the formula to easily see the equation and the necessary calculation. As an example, you might write:

    4/5 x 5/6 = ?

    Multiply the numerators together and then the denominators together. In the example, you would multiple 4/5 times 5/6 to get 20/30.

    Reduce the fraction by factoring out common multiples. In the example, both numbers are divisible by 10, so you can divide them both by 10 and use the result -- 2/3.

Related Articles

How to Evaluate Fractions
How to Multiply Fractions by Percentages
How to Add & Subtract Fractions With Monomials
How to Find the Product of Fractions
How to Calculate Volume
How to Multiply 3 Fractions
How to Subtract Mixed Numbers With Regrouping
How to Factor Monomials
How to Multiply and Divide Mixed Fractions
How to Factorise a Quadratic Expression
How to Simplify Algebraic Expressions
How to Find Equivalent Expressions
How to Convert Percent to Fraction
How to Divide a Percent Using a Calculator
Multiplying Fractions
Tips for Subtracting Rational Expressions
How to Add & Subtract Improper Fractions
How to: Improper Fractions Into Proper Fractions
How to Divide Exponents With Different Bases
What Is the Square Root Method?