Find the least common denominator: This is the smallest number that both denominators can divide into evenly. For 1/4 and 1/6, the LCD is 12. Adjust your fractions: Multiply each fraction to get ...

How to add or subtract fractions: When the denominators close denominatorNumber written on the bottom of a fraction. The denominator is the number of equal parts, eg for ⅓, the denominator is 3 ...

Note: You'll sometimes encounter a mixed number (also called a mixed fraction), which is the combination of a whole number and a proper fraction. When subtracting mixed fractions, such as 2 1/2 – 1 ...

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.