Fractions can be added in different ways: When the denominators are the same, add the numerators. Sometimes the final answer can be simplified. close simplify (a fraction)To reduce a fraction to ...

The lowest/least common multiple (abbreviated to LCM) is the lowest number that is a multiple of two or more subject-numbers. For example, the common multiples of 4 and 5 are 20, 40, 60, 80 and so on.