Explain how to solve problems where the percentage part and size is known but the whole is unknown
I can solve problems where a percentage part is known but the whole is unknown.
Explain how to solve problems where the percentage part and size is known but the whole is unknown
I can solve problems where a percentage part is known but the whole is unknown.
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Lesson details
Key learning points
- If I know about a part, I can work out the whole from that part.
- If I know what 10% is, I can multiply by 10 to calculate 100%.
- If the part is a factor of 100, I can multiply the part by the other factor to calculate the whole.
Keywords
Percentage - A percentage is a proportion of a whole.
Common misconception
Pupils may not always instantly recognise that a percentage part is a factor of 100
Discuss factors of 100 with the pupils, for example, as factor pairs. Allow them to keep these displayed to refer to throughout the lesson if needed to help make this connection.
To help you plan your year 6 maths lesson on: Explain how to solve problems where the percentage part and size is known but the whole is unknown, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 6 maths lesson on: Explain how to solve problems where the percentage part and size is known but the whole is unknown, 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.
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Explore more key stage 2 maths lessons from the Understanding percentages unit, dive into the full primary maths curriculum, or learn more about lesson planning.
Licence
Prior knowledge starter quiz
6 Questions
160 km
32 km
3.2 km
80 km
240 km
3 km
4.5 km
9 km
0.75 km
12 km




Assessment exit quiz
6 Questions
I can multiply by 10 to calculate 100%
I can multiply by 4 to calculate 100%
I can multiply by 2 to calculate 100%
I can multiply by 5 to calculate 100%


