Percentages Practice
Start with the ones you already know without knowing it — half, a tenth, a quarter — and build up from there. Every answer works out to a whole number, so the percentage is the only thing being tested.
No account, and the maths stays in your browser — more— less
This activity is for learning and practice. Anything it suggests is indicative only — it is not a formal assessment and not a substitute for a teacher or tutor.
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Set your country and age — change
Setting an age keeps the questions at the right level for that age. It does not lock anything — you can still try any topic, at any age, in any order. Levels are a guide only, not a curriculum.
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Saving your progress
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You already know most of this
Per cent just means “per hundred” — so many out of every hundred. Almost every percentage question can be built from three you can already do in your head.
- 50% is half. You have been halving things since long before anyone said the word percent.
- 10% is one tenth — divide by 10. And once you have 10%, you have 20%, 30%, 70%: just count how many lots of it you need.
- 25% is a quarter — half, and half again.
- 1% is one hundredth — divide by 100. That one unlocks the awkward percentages like 37%.
The trap in “increase by 20%”
Finding 20% is only half the job. The question asks what the number becomes, not how much it moved — so once you have the 20%, you still have to add it on. The same goes for a reduction, where you take it off. Working out the change and stopping there is the most common way to get these wrong.
School levels
School levels are a guide only. They show where a skill is usually taught in each country and are not taken from, aligned to, or endorsed by any curriculum authority. Your school may cover it earlier or later.