Ratio and Rates Review

Front

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.

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

How do you find the unit rate?

Back

To find the unit rate, divide the quantity by the number of units. For example, if there are 88 students in 4 classes, the unit rate is 88 ÷ 4 = 22 students per class.

Front

What is the unit rate for 90 miles in 12 hours?

Back

The unit rate is 90 miles ÷ 12 hours = 7.5 miles per hour.

Front

How do you solve for a missing number in a ratio table?

Back

To solve for a missing number in a ratio table, use equivalent ratios or cross-multiplication to find the unknown value.

Front

If 13 out of 20 homes have a computer, how many homes would have a computer on a street with 60 homes?

Back

To find this, set up a proportion: (13/20) = (x/60). Solving gives x = 39 homes.

Front

What does it mean if a ratio is simplified?

Back

A simplified ratio means that the numbers in the ratio have been reduced to their smallest whole number form.

Front

What is the difference between a ratio and a fraction?

Back

A ratio compares two quantities, while a fraction represents a part of a whole.

Front

How can you express a ratio of 4 to 5 in different forms?

Back

You can express it as 4:5, 4/5, or '4 to 5'.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.