Reducing to the Least Common Denominator

To reduce a fraction to the Least Common Denominator, you must factor each of the denominators into primes. Then for each different prime number in all of the factorizations, do the following...
1. Count the number of times each prime number appears in each of the factorizations.
2. For each prime number, take the largest of these counts and write the result.
3. The least common denominator is the product of all the prime numbers written down.
Revision with Maths Exercices http://www.emathematics.net/