Increase by a percentage
I can calculate percentage changes (increase).
Increase by a percentage
I can calculate percentage changes (increase).
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Lesson details
Key learning points
- A bar model can be used to find a percentage increase.
- A double number line can be used to find a percentage increase.
- A ratio table can be used to find a percentage increase.
Keywords
Proportionality - If two things are proportional then the ratio of part to whole is maintained and the multiplicative relationship between parts is also maintained.
Common misconception
A single digit percentage is incorrectly worked out by dividing by 10 and not 100 e.g 3% = 0.3. This error continues when increasing amounts e.g increase 40 by 3% has a multiplier of 1.3
Remind pupils that to covert a percentage into a decimal we divide by 100. This applies with increase too e.g 120% has a multiplier of 1.2
To help you plan your year 8 maths lesson on: Increase by a percentage, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 8 maths lesson on: Increase by a percentage, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 3 maths lessons from the Understanding multiplicative relationships: percentages and proportionality unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
48
24
60
96
72
30
32% of 560
41% of 560
3.2% of 560
4.1% of 560
Exit quiz
6 Questions
Work out 102% of 450
Work out 120% of 450
Work out 112% of 450
Work out 101.2% of 450
×1.88
×1.088
×1.8
×1.08