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.

Support your knowledge of this topic by looking at these guides on Lowest Common Multiple and equivalent fractions. Look at the examples below on how to add and subtract fractions and mixed numbers.

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 ...