FLASHCARD: Ratios & Unit Rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per' something (e.g., miles per hour, dollars per pound).

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find the amount per one unit of the second quantity.

Front

If 3 pounds of granola cost $3.75, what is the unit rate?

Back

$1.25 per pound.

Front

Which is a better deal: $4.39 for 11.5 oz of Doritos or $3.24 for 9.75 oz of Cheetos?

Back

Cheetos is the better deal.

Front

What is the unit rate for 2 miles in 12 minutes?

Back

1/6 mile per minute.

Front

If you can read 40 words in 2 minutes, what is your reading speed in words per minute?

Back

20 words per minute.

Front

What does the ratio 1:x = 5:20 imply?

Back

It implies that x = 4.

Front

What is the purpose of finding a unit rate?

Back

Finding a unit rate helps to compare different quantities on a common basis, making it easier to determine the better deal or faster rate.

Front

How can you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor.