Ratio and proportion vocabulary · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Ratio and proportion: comparing parts

Mathematics · Ratio & Proportion · ages 9-11
Name ______________________   Date ____________

  1. What does 'per cent' mean?

    • Out of 10
    • Out of 100
    • Out of 1000

  2. A fruit bowl has 4 apples and 6 oranges. Which shows the ratio of apples to oranges?

    ?
    • 4:6
    • 4 out of 10
    • 6:4

  3. A proportion compares a part to the whole amount.

    Circle one:   True   False

  4. Write 3/4 as a percentage. Type just the number.

    Answer: ______________

  5. A recipe uses 2 cups of flour and 3 cups of sugar. What is the proportion of flour in the whole mixture?

    ?
    • 2:3
    • 2 out of 5
    • 3 out of 5

  6. A photo is enlarged with a scale factor of 2. The photo was 5 cm wide. How wide is it now?

    • 7 cm
    • 10 cm
    • 2 cm

  7. A basket has 6 apples and 4 pears. What is the ratio of apples to pears, and what proportion of the basket is apples?

    • Ratio 6:4, proportion 6 out of 10
    • Ratio 6:10, proportion 4 out of 6
    • Ratio 4:6, proportion 6 out of 4

  8. Ben says, 'The model car has a scale factor of 1:10, so it's 10 times bigger than the real car.' What is his mistake?

    • A scale factor of 1:10 means the model is 10 times smaller, not bigger
    • He should have said the model is 100 times smaller
    • There is no mistake
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Ratio and proportion: comparing parts W1-mt_ESgc4YBw-a-s1

  1. Out of 100 · Per cent means out of 100. So 50% is 50 out of 100.
  2. 4:6 · A ratio compares part to part: 4 apples to 6 oranges is written 4:6.
  3. True · That's right. A proportion is part-to-whole, like 3 out of 5.
  4. 75 · 3 out of 4 is the same as 75 out of 100, so 3/4 equals 75%.
  5. 2 out of 5 · The total is 5 cups. Flour is 2 of those 5 cups, so the proportion is 2 out of 5.
  6. 10 cm · A scale factor of 2 doubles every length: 5 cm becomes 10 cm.
  7. Ratio 6:4, proportion 6 out of 10 · Ratio compares part to part, so apples to pears is 6:4. Proportion compares part to whole, so apples make up 6 out of the 10 total pieces of fruit.
  8. A scale factor of 1:10 means the model is 10 times smaller, not bigger · A scale factor of 1:10 means the model's lengths are one tenth of the real car's, so the model is smaller, not bigger.
Worksheet · LightMySky