A unit rate expresses a ratio with a denominator of 1 — the rate per single unit. Examples: miles per hour, price per pound, steps per minute. Unit rates allow direct comparison between different quantities.
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Pro Tip
Supermarket unit pricing (price per ounce/gram) is posted on shelf labels for exactly this reason — it makes comparison shopping trivial. Generic brands often have a lower unit price even when the package costs more.
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Did You Know?
Unit rates are the foundation of proportional reasoning — a skill identified as one of the most important in K-12 mathematics. Students who master unit rates in middle school have significantly higher success rates in algebra and higher mathematics.
References
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