# Finding common denominators

Calculate the least common multiple LCM (3; 7; 13) LCM (3; 7; 13) = 273. Find additional factors for each fraction, for this divide LCM by the denominators of each fraction: 273 : 3 = 91 (factor

Our users love us ## How to Find Common Denominators

Step 1: Find the least common denominator. There are two ways that we can find the common denominator: skip counting using multiples or by factoring each denominator. For this

## Adding and subtracting fractions by finding a common

The easiest way to find a common denominator for a pair of fractions is to multiply the numerator and denominator of each fraction by the denominator of the other. So, if you’re

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A common denominator is a number with which both denominators share at least one factor other than 1. Fractions without a Common Denominator. We can obtain common denominators by multiplying both numerator (top) and denominator (bottom) by the same amount. For example, consider the addition of two fractions that do not have the same denominator: Addition of 2 ⁄ 5 and 1 ⁄ 2 . First, multiply 2 ⁄ 5 by 2 ⁄ 2 to get 4 ⁄ 10 .

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