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Learn: Ratio and Proportion
iGCSE Mathematics
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Welcome!Today we'll explore ratio and proportion. These concepts are essential in solving problems involving comparisons and scaling. Let's dive in step-by-step!
What is a ratio?A ratio compares two or more quantities. It shows how much of one quantity exists compared to another. Ratios can be written in the form a:b, where 'a' and 'b' are the amounts being compared.
Quick check: Which of these is a correct way to express a ratio?
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How to simplify ratios?To simplify a ratio, divide both parts by their highest common factor (HCF). This ensures the ratio is in its simplest form.
Match the items on the left with their correct pairs on the right
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What is proportion?Proportion shows that two ratios are equal. For example, if 2:3 and 4:6 represent the same relationship, they are proportional.
Two ratios are proportional if {{blank0}} of one ratio equals the {{blank1}} of the other.
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Using proportion in real lifeProportions are used in recipes, scaling drawings, and converting currencies. For example, if a recipe uses 2 cups of flour for every 3 cups of sugar, doubling the recipe maintains the proportion.
Which of the following are examples of proportion? (Select all that apply)
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Review Time!Great work! You've learned about ratios and proportions. Now let's test your understanding with a few questions.
Match the items on the left with their correct pairs on the right
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Match the items on the left with their correct pairs on the right
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What is the simplified form of 15:20?
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Lesson Complete!Well done! You now understand how to work with ratios and proportions. Keep practising to master these concepts!
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