Ratios and Proportions Mid-Year 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

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 do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

What is the formula for finding 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 another quantity'.

Front

If 60 minutes are needed for 4 games, how many minutes are needed for 1 game?

Back

15 minutes per game.

Front

What is the cost per item if the total cost is $144.50 for 17 items?

Back

$8.50 per ticket.

Front

How do you set up a proportion from a word problem?

Back

Identify the two ratios from the problem and set them equal to each other.

Front

What does it mean to find a missing value in a proportion?

Back

It means to determine the unknown quantity that makes the two ratios equivalent.

Front

If z/6 = 35/42, how do you find z?

Back

Cross-multiply to get z = 5.