Review: Rates, Ratios, and Percents Unit Test

Front

What is a rate?

Back

A rate is a ratio that compares two quantities with different units, often expressed as a quantity per unit of another quantity.

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How do you calculate the unit rate?

Back

To calculate the unit rate, divide the quantity by the number of units. For example, if you travel 567 miles in 9 hours, the unit rate is 567 miles ÷ 9 hours = 63 mph.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another, often expressed in the form a:b.

Front

How do you convert cups to quarts?

Back

To convert cups to quarts, divide the number of cups by 4, since there are 4 cups in a quart.

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100, indicating how many parts out of 100 are being considered.

Front

How do you find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 80% of 70, calculate 70 x 0.80 = 56.

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What is the formula for converting meters to centimeters?

Back

To convert meters to centimeters, multiply the number of meters by 100, since there are 100 centimeters in a meter.

Front

What is the relationship between rates, ratios, and percents?

Back

Rates, ratios, and percents are all ways to compare quantities. A rate compares different units, a ratio compares similar units, and a percent expresses a ratio as a part of 100.

Front

How do you calculate the cost per item?

Back

To calculate the cost per item, divide the total cost by the number of items purchased. For example, if 13 peaches cost $8.84, the cost per peach is $8.84 ÷ 13.

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What is the significance of unit rates in real-life applications?

Back

Unit rates help in making comparisons and informed decisions, such as determining the best value for money or understanding speed.