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.

Use visual fraction models to add and subtract fractions with the same denominators.

Revise how to add, subtract, multiply and divide fractions, how to use a calculator for fractions and how to find fractions of amounts in this GCSE maths guide.

Watch how to master adding fractions with different denominators from the world's leading how to specialist. This advice video will give you helpful instructions to ensure you get good at math.