Working out percentages without a calculator might seem tricky, but... Show more
Maths352 views·Updated Jun 9, 2026·1 pageCalculating Percentages of an Amount Made Easy
Kacie-Marie Williams@kaciemariewilliams_fdeo
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Finding Percentages Without a Calculator
Finding percentages becomes much easier when you use the building block method. Start with 10% (just divide by 10), then build up to whatever percentage you need.
For 15% of £65, you'd find 10% first by dividing £65 by 10, giving you £6.50. Then get 5% by halving the 10% amount (£6.50 ÷ 2 = £3.25). Add them together: £6.50 + £3.25 = £9.75.
For trickier percentages like 32%, break it down into 30% + 2%. Find 10% of £41 (£4.10), multiply by 3 for 30% (£12.30). Then find 1% by dividing by 100 (£0.41), multiply by 2 for 2% (£0.82). Finally, add: £12.30 + £0.82 = £13.12.
Quick Tip: Remember that 10% = divide by 10, 5% = half of 10%, and 1% = divide by 100. These are your building blocks for any percentage!
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Maths352 views·Updated Jun 9, 2026·1 pageCalculating Percentages of an Amount Made Easy
Kacie-Marie Williams@kaciemariewilliams_fdeo
Working out percentages without a calculator might seem tricky, but it's actually quite straightforward once you learn a few clever tricks. The key is breaking down any percentage into simple chunks like 10%, 5%, and 1% that are easy to... Show more
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Finding Percentages Without a Calculator
Finding percentages becomes much easier when you use the building block method. Start with 10% (just divide by 10), then build up to whatever percentage you need.
For 15% of £65, you'd find 10% first by dividing £65 by 10, giving you £6.50. Then get 5% by halving the 10% amount (£6.50 ÷ 2 = £3.25). Add them together: £6.50 + £3.25 = £9.75.
For trickier percentages like 32%, break it down into 30% + 2%. Find 10% of £41 (£4.10), multiply by 3 for 30% (£12.30). Then find 1% by dividing by 100 (£0.41), multiply by 2 for 2% (£0.82). Finally, add: £12.30 + £0.82 = £13.12.
Quick Tip: Remember that 10% = divide by 10, 5% = half of 10%, and 1% = divide by 100. These are your building blocks for any percentage!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Similar content
Most popular content: Percent of a Number
1Most popular content in Maths
9Most popular content
9Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5App Store
4.7/5Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan SiOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha KlichAndroid user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
AnnaiOS user