In adding and subtracting fractions with unlike denominators, you have to get a least common denominator which is exactly like the least common multiple it just so happens to be in the denominator.

Unit fractions can be compared by looking at the denominator, or the number of equal pieces the whole has been divided into. The denominator is the number below the division bar. Unit fractions always ...

Many things learned in high school are never to be used again. But you can apply some basic principles of high school mathematics to catalog measurement, says Mike Grant of Scarsdale, NY-based catalog ...