Rates/Unit Rates/Better Buy

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What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

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What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. For example, if a car travels 150 miles in 3 hours, the unit rate is 50 miles per hour.

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How do you find a unit rate from a total rate?

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To find a unit rate, divide the total quantity by the number of units. For example, if you have 240 words typed in 4 minutes, divide 240 by 4 to get 60 words per minute.

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What is the formula to find a unit rate?

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The formula to find a unit rate is: Unit Rate = Total Quantity / Number of Units.

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If a recipe requires 4 cups of flour for 2 cakes, what is the unit rate of flour per cake?

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The unit rate is 2 cups of flour per cake.

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What does it mean to find a 'better buy'?

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Finding a 'better buy' means comparing prices of similar items to determine which one offers more value for the cost.

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How do you compare two unit rates?

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To compare two unit rates, calculate the unit rate for each option and then compare the values. The lower unit rate usually indicates a better buy.

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If 3 apples cost $1.50, what is the cost per apple?

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The cost per apple (unit rate) is $0.50.

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What is the relationship between ratios and fractions?

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Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

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x = 75.