Ratio Tables and Proportions

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 proportion?

Back

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

Front

How do you find a missing value in a ratio table?

Back

To find a missing value in a ratio table, you can set up a proportion using the known values and solve for the unknown.

Front

If a car travels 50 miles in 40 minutes, how far does it travel in 20 minutes?

Back

25 miles.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

How do you convert a ratio to a fraction?

Back

You can convert a ratio a:b to a fraction by writing it as a/b.

Front

What is the scale of a map?

Back

The scale of a map shows the relationship between distances on the map and actual distances in the real world.

Front

If 6 cm on a map represents 15 km, how many kilometers does 1 cm represent?

Back

2.5 km.

Front

What is the unit rate?

Back

The unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per'.

Front

If Will spent $3.75 for 3 pounds of granola, how much does he spend per pound?

Back

$1.25 per pound.