Understanding Proportions: Real-Life Applications and Examples

Jan 14, 2026

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Proportion is the principle that relates how quantities change at the same rate. It plays a crucial role in everyday situations, such as shopping. For instance, if a pack contains 9 toilet rolls for £4, one can easily calculate the price for a larger pack of 36 rolls using proportion. This concept also extends to calculating pay rates; for example, if you know how much someone earns per hour, you can determine their earnings for any number of hours worked. Understanding proportion helps in making better financial decisions and informed choices.

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Understanding Proportions: Real-Life Applications and Examples

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GCSE MATHS Proportion
ProportionWhat is it? • Proportion is the idea that things get bigger (or smaller) at the same rate. • WHAT? • What does this mean or where does it apply in real life?

Real life proportions • When going shopping you might see a packet of toilet rolls like this • A pack of toilet roll may be • 9 rolls for £4 • How much will 36 rolls be? • You use proportion to answer this question because the price for 9 toilet rolls will not change.
We work out how much he gets paid for 1 hour. • Then we can use his hourly rate and find out 15 hours.