Ratio and Proportions Test Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities expressed as a fraction, indicating 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 solve for an unknown in a proportion?

Back

To solve for an unknown in a proportion, cross-multiply the two ratios and then isolate the variable.

Front

If 25 liters of jam are made in 5 days, how much jam is made in 1 day?

Back

5 liters of jam are made in 1 day.

Front

If Sasha jars 25 liters of jam in 5 days, how much jam will she jar in 7 days?

Back

35 liters of jam.

Front

What is the formula to find the price per gallon of gas?

Back

Price per gallon = Total cost / Number of gallons.

Front

If it costs $46.80 to fill a 13-gallon gas tank, what is the price per gallon?

Back

$3.60 per gallon.

Front

What is the relationship between width and height in a proportion?

Back

In a proportion, the ratio of width to height remains constant.

Front

If Emily's painting has a width of 3 inches and a height of 4 inches, what is the new height if the width is enlarged to 15 inches?

Back

The new height is 20 inches.

Front

How do you set up a proportion to find an unknown height when the width is changed?

Back

Set up the proportion as (original width / original height) = (new width / new height).