# How do you find the least common denominator

Contents

- 1 How do you find the LCD?
- 2 How do you find the LCD of a fraction?
- 3 How do you find the least LCD?
- 4 What is a least common denominator in math?
- 5 How do you find the least common denominator with variables?
- 6 How do you find the least common denominator using multiple methods?
- 7 How do you find the lowest common denominator for each part by the division method?
- 8 How do you find the common denominator of a variable?

## How do you find the LCD?

In order to use the greatest common factor to solve the problem, you must first multiply the two denominators together. Divide this product by the GCF. After finding the product of the two denominators,

**divide that product by the GCF you found previously**. This number will be your least common denominator (LCD).## How do you find the LCD of a fraction?

**Find the least common denominator (LCD) of two fractions**

- Factor each denominator into its primes.
- List the primes, matching primes in columns when possible.
- Bring down the columns.
- Multiply the factors. The product is the LCM of the denominators.
- The LCM of the denominators is the LCD of the fractions.

## How do you find the least LCD?

To find the least common denominator first convert all integers and mixed numbers (mixed fractions) into fractions. Then find the lowest common multiple ( LCM )

**of the denominators**. This number is same as the least common denominator ( LCD ).## What is a least common denominator in math?

noun Mathematics. the

**smallest number that**is a common denominator of a given set of fractions.## How do you find the least common denominator with variables?

## How do you find the least common denominator using multiple methods?

To find the least common denominator, simply list the multiples of each denominator (multiply by 2, 3, 4, etc. out to about 6 or seven usually works) then

**look for the smallest number that appears in each list**. Example: Suppose we wanted to add 1/5 + 1/6 + 1/15.## How do you find the lowest common denominator for each part by the division method?

To find the LCM by division method, we

**write the given numbers in a row separately by commas, then divide the numbers by a common prime number**. We stop dividing after reaching the prime numbers. The product of common and uncommon prime factor is the LCM of given numbers.