Learn about and revise how to convert between fractions, decimals and percentages with this BBC Bitesize GCSE Maths Edexcel study guide.

A usable fraction is a fraction you can use to measure with (i.e., 1/2, 1/4, 1/8, 1/16 inch). You measure with fractions of an inch. However, your calculator works in decimals of an inch.