Answers.com
In order to find the LCD when adding or subtracting fractions
The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.
Factor :D
By reducing them to their lowest terms
24/42 = 4/7
They are useful in reducing fractions and to simplify radicals. They are useful in reducing fractions and to simplify radicals.
When you are reducing fractions.
Answers.com
In order to find the LCD when adding or subtracting fractions
reducing
Expanding fractions
Reducing to lowest terms eg 64/96 = 32/48 = 16/24 = 8/12 = 4/6 = 2/3
The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.
When reducing fractions to their lowest terms or finding the LCD of fractions
Factor :D
When you are reducing fractions.