Lowest common multiple and highest common factor

Both the lowest common multiple and highest common factor are useful when using fractions.

The lowest common multiple (lcm) of two numbers is the lowest number that they will both divide into exactly (without leaving any remainder).

The highest common factor (hcf) of two numbers is the highest number that will divide into both those numbers exactly.

Choose two numbers and the lcm and hcf of them will be worked out for you.