5.3 Writing Proportions Review

Front

What is a proportion?

Back

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

Front

How do you set up a proportion?

Back

To set up a proportion, you can use the formula \( \frac{a}{b} = \frac{c}{d} \), where a and b are one ratio, and c and d are another.

Front

What is the ratio of flour to water in the given problem?

Back

The ratio of flour to water is 5 to 3.

Front

If you have 30 cups of water, how much flour do you need?

Back

You need 50 cups of flour.

Front

What is the first step to solve a proportion problem?

Back

The first step is to identify the two ratios that you are comparing.

Front

How do you find the missing value in a proportion?

Back

Cross-multiply the known values and then solve for the unknown.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

In the context of the quarterback's passes, what is the ratio of completed passes to attempted passes?

Back

The ratio is 7 to 8.

Front

If a quarterback attempted 24 passes, how many passes did he complete?

Back

He completed 21 passes.

Front

What is the formula to find a percentage of a total?

Back

The formula is \( \text{Percentage} = \frac{\text{Part}}{\text{Whole}} \times 100 \) .