Unit 3A Ratios and Proportions Test

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 factor (GCF).

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 form a proportion?

Back

Cross-multiply the ratios. If the products are equal, the ratios form a proportion.

Front

What is the unit rate?

Back

The unit rate is a ratio that compares a quantity to one unit of another quantity.

Front

How do you find the unit price?

Back

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

Front

What is the constant rate in a proportional relationship?

Back

The constant rate is the ratio that remains the same throughout the relationship.

Front

How do you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity.

Front

What is the ratio of boys to girls if there are 6 boys and 12 girls?

Back

The ratio of boys to girls is 1/2.

Front

If Becca walked 3 miles in 48 minutes, how do you find her walking rate?

Back

Convert 48 minutes to hours (0.8 hours) and divide 3 miles by 0.8 hours to get 3.75 miles per hour.