Ratios and Proportions

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 simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a proportion?

Back

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

Front

How can you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.

Front

What is a unit rate?

Back

A unit rate is a comparison of a quantity to one unit of another quantity, often expressed as 'per' something.

Front

How do you find the unit rate from a total cost?

Back

To find the unit rate, divide the total cost by the number of units.

Front

What is the ratio of total players to boys in a team with 16 girls and 8 boys?

Back

The ratio is 3:1.

Front

What does it mean if a table does not represent a proportional relationship?

Back

It means that the ratios of the values in the table are not equivalent.

Front

If a pizza has 8 slices and costs $12, what is the cost per slice?

Back

The cost per slice is $1.50.

Front

What is the missing number in the ratio table if the ratio is 21:7?

Back

The missing number is 21.