7th Grade Ratios and Proportions Test Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a proportion?

Back

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

Front

How do you convert a scale drawing to actual dimensions?

Back

To convert a scale drawing to actual dimensions, multiply the measurements in the drawing by the scale factor.

Front

If a sweater costs $45 and is on sale for 25% off, how do you calculate the sale price?

Back

To calculate the sale price, multiply the original price by the discount percentage (0.25) and subtract that from the original price: $45 - ($45 * 0.25) = $33.75.

Front

What is the scale of a map?

Back

The scale of a map is the ratio of a distance on the map to the corresponding distance on the ground.

Front

If a map has a scale of 1 cm = 20 miles, how do you find the distance on the map for 90 miles?

Back

To find the distance on the map, divide the actual distance by the scale factor: 90 miles ÷ 20 miles/cm = 4.5 cm.

Front

What does it mean for two quantities to be in a proportional relationship?

Back

Two quantities are in a proportional relationship if they maintain a constant ratio or rate.

Front

How can you determine if a table represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of corresponding values are equal.

Front

What is the formula for finding the percentage of a number?

Back

The formula for finding the percentage of a number is: (percentage rate / 100) * total amount.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.