Ratios and Proportions 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 proportion?

Back

A proportion is an equation that states that two ratios are equal, often written as a/b = c/d.

Front

How do you find the missing value in a proportion?

Back

To find the missing value in a proportion, cross-multiply the known values and solve for the unknown.

Front

If Demetrius drives for 2 hours at 55 miles per hour, how far does he travel?

Back

Distance = Speed × Time = 55 miles/hour × 2 hours = 110 miles.

Front

How do you determine the best buy when comparing prices?

Back

To determine the best buy, calculate the price per unit for each option and compare them.

Front

What is the ratio of brownies sold to the total number of cupcakes and cookies sold if 32 brownies, 43 cupcakes, and 32 cookies were sold?

Back

The total number of cupcakes and cookies sold is 43 + 32 = 75. The ratio is 32:75.

Front

What is the pattern in a sequence of numbers?

Back

A pattern in a sequence of numbers is a consistent rule or relationship that defines how the numbers progress.

Front

How many members are needed to walk 15 dogs if the ratio is 3 members for every 5 dogs?

Back

Using the ratio, 15 dogs would require (15/5) × 3 = 9 members.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first quantity as the numerator and the second quantity as the denominator.