Everyday maths & practical explanations

Small Calculations. Clearer Everyday Choices.

Practical guides to percentages, measurements, time and everyday maths. Learn the method, follow the example and make sense of the numbers.

Clear methods. Worked examples. A little more confidence with numbers.

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Latest Articles

Understand three useful ways to describe a small set of numbers, with an outlier example.

October 25, 2026Read More

Learn the direction of common metric length conversions and check whether your answer makes sense.

October 25, 2026Read More

Convert hours and minutes to decimal hours without confusing clock notation with decimal notation.

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Use a scaling factor to adjust ingredient quantities while keeping proportions consistent.

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Learn why a change in a percentage and a change in percentage points are not the same thing.

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A step-by-step explanation of percentages, with worked examples and a quick way to check your answer.

October 25, 2026Read More

A clearer way to work it out

A useful calculation starts with the right question. Follow a few simple habits to avoid mix-ups and make your answers easier to check.

Identify what you know, what you need and the whole you are comparing against.

Label minutes, metres and percentages so different quantities do not get mixed up.

Estimate the result or reverse the steps to see whether the answer makes sense.

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Calcuo is an independent educational blog making everyday calculations easier to understand, one clear explanation at a time.

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