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.

Fractions can be added in different ways: When fractions have the same denominator close denominatorNumber written on the bottom of a fraction. The denominator is the number of equal parts. Eg ...

Find out how to add and subtract fractions with matching and different denominators in this video, activity and Second Level Maths Bitesize Guide.