The easiest fractions to add or subtract are those with the same denominator. Improper fractions have a numerator larger than the denominator.Īdding and Subtracting Fractions See our pages, Addition and Subtraction for more general help. Proper fractions have a numerator smaller than the denominator. The numbers in a fraction are called the numerator, on the top, and the denominator, on the bottom. Although the rules may seem slightly more complicated for fractions, with a little practice they are relatively easy to grasp. One divided by two, or often said as 'one over two'.įractions, like decimals, are only numbers. They are also commonly expressed as one number over another.Ī half, for example, is written as ½. Our page Numbers an Introduction explains that fractions are expressed as a division calculation, one number divided by another. Placing a bet on the Grand National and calculating your potential winnings. Working out how much those designer jeans cost in the ‘third off’ sale. Working out the quantities of ingredients to feed a dinner party for 12 when your recipe feeds 4.Ĭalculating your Body Mass Index (BMI) for health and diet purposes relies on a knowledge of fractions.īudgeting and pay rises – calculating what fraction of your earnings you can afford to put aside for your summer holiday. Splitting a restaurant bill between friends or working out your share of rent between flatmates.Ĭalculating how to share the remaining three quarters of a pizza fairly between 6 squabbling children. Here are some examples:Ī quarter of an hour or two and a half hours – we use fractions to express lengths of time.įractions are useful when measuring, particularly if you are using the Imperial system, for example, inches are commonly split into eighths and sixteenths. Understanding how fractions work, how to manipulate them, and how to perform calculations with them are skills that are useful in a surprising number of everyday situations. Like decimals, fractions describe parts of a whole.
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