MathsYears 7–9Ratio & Proportion

Ratio notation and simplifying

Use ratio notation; simplify ratios and divide a quantity in a given ratio

What you'll learn

  1. 1

    Imagine a bag of 8 sweets — 3 are red and 5 are yellow. The ratio of red to yellow is 3 : 5.

  2. 2

    What does the colon (:) mean in a ratio?

  3. 3

    Drag the sweets to match the ratio 2 : 3 (blue : green).

  4. 4

    Let's simplify the ratio 6 : 9 together.

  5. 5

    Simplify 10 : 15 using the bar model.

  6. 6

    What is 8 : 12 simplified?

  7. 7

    A recipe uses 4 cups flour and 2 cups sugar. What is the ratio flour : sugar in simplest form?

Practise Ratio notation and simplifying with Whizlo

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