Ratios and Rates 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

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor (GCF).

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as speed (miles per hour) or price per item.

Front

If there are 21 red apple trees and 18 green apple trees, what is the ratio of green apple trees to red apple trees?

Back

6:7

Front

How do you set up a proportion?

Back

A proportion is an equation that states that two ratios are equal. To set it up, write the two ratios as fractions and set them equal to each other.

Front

If a concession stand serves hot dogs and hamburgers at a ratio of 3 to 2, how many hamburgers will be served if there are 60 hot dogs?

Back

40 hamburgers

Front

What is the formula to find the unit rate?

Back

The unit rate is found by dividing the first quantity by the second quantity, expressed as 'quantity per 1 unit of the second quantity'.

Front

If Yvonne paid $18.72 for 8 gallons of gas, what is the price per gallon?

Back

$2.34 per gallon.

Front

How do you calculate savings when comparing prices?

Back

Subtract the lower price from the higher price to find the amount saved.

Front

What is the greatest common factor (GCF)?

Back

The GCF is the largest number that divides two or more numbers without leaving a remainder.