Divide in a Given Ratio — Interactive Lesson (Ages 11–14)

How do you share £100 in the ratio 3 : 2? This 22-slide interactive lesson teaches students how to divide in a given ratio using a clear three-step method.

Mastering Dividing in a Given Ratio in Year 7–9 Maths

Students learn to divide quantities based on a given ratio and to recognise the importance of ratios in different contexts. The method has three steps: add the ratio together, divide the total by that number of parts, then multiply each part by the result. Examples include two friends dividing £100 in the ratio 3 : 2, and pineapple, orange and apple juice mixed in the ratio 2 : 3 : 5 to make 250 ml, giving 50 ml, 75 ml and 125 ml.

What’s Included

• 22-slide interactive lesson on dividing in a given ratio
• Learning objectives on dividing quantities and applying ratios
• A clear three-step method with worked examples
• Money, drinks and club membership problems
• Fill-in-the-blank questions with instant feedback

Key Benefits for Students

• Gives students a reliable method they can reuse
• Uses the idea of one part to find each share
• Extends to ratios with three parts
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• Worked examples model each step
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• Real-life contexts make ratio meaningful

Love this? You’ll love…

• Simplifying Ratios — Interactive Lesson (Ages 11–14)
• Introduction to Percentages — Interactive Lesson (Year 7)
• Basic Percentage Calculations — Interactive Lesson (Ages 11–14)

A dependable addition to a KS3 ratio and proportion unit, giving students a clear routine for a common exam question. Confidence here supports percentages, scale and GCSE ratio problems.

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FAQ

What year group is this for? KS3 — Years 7–9 (ages 11–14).

Does it cover three-part ratios? Yes — for example juice mixed in the ratio 2 : 3 : 5.

Is it self-marking? Yes, with instant feedback on the questions.