Ratios
Program of Studies
Number: Quantity is measured with numbers that enable counting, labelling, comparing, and operating.
How can ratios provide new ways to relate numbers?
Students employ ratios to represent relationships between quantities.
Knowledge
A ratio can express part-part or part-whole relationships between two countable or measurable quantities. A ratio can be expressed with a fraction or with a colon. A percentage represents a part-whole ratio that compares a quantity to 100.
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Understanding
A ratio is a comparison of two quantities in a specific situation. Fractions, decimals, ratios, and percentages can represent the same part-whole relationship.
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Skills and Procedures
Express part-part ratios and part-whole ratios of the same whole to describe various situations. Express, symbolically, the same part-whole relationship as a ratio, fraction, decimal, and percentage.
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