Ratios and Rates

Front

What is a ratio?

Back

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

Front

How do you express a ratio?

Back

Ratios can be expressed in three ways: using a colon (e.g., 3:2), as a fraction (e.g., 3/2), or with the word 'to' (e.g., 3 to 2).

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

Front

If a car travels 60 miles in 1 hour, what is its speed in miles per hour?

Back

60 miles per hour.

Front

Which rate is equivalent to 15 miles per hour? 30 miles in 3 hours, 30 miles in 2 hours, 30 miles in 5 hours?

Back

30 miles in 2 hours.

Front

What is the ratio of girls to boys if there are 7 boys and 9 girls?

Back

9 to 7.

Front

In a box of 48 oranges, if 1 in every 6 oranges is rotten, how many rotten oranges are there?

Back

8 rotten oranges.

Front

You have 29 books on your shelf and have read 18 of them. What is the ratio of books not read to all books?

Back

11 : 29.

Front

True or False: A ratio can only compare quantities of the same kind.

Back

False. A ratio can compare different kinds of quantities.

Front

What is the simplest form of the ratio 4:8?

Back

1:2.