This resource features three lessons on ratio problems, but with an emphasis on using fractions in calculations and not relying on calculators or decimals.
The students may well have seen ratio already in which case their methods may be different to those used here, which is fine!
KS3 Maths Curriculum Area
Ratio, proportion and rates of change Understand that a multiplicative relationship between two quantities can be expressed as a ratio or a fraction
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Three Multiplicative Relationships Lessons on Ratio Problems for KS3 Maths
