Solving Proportions Review

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 cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 1 Euro = 1.18 American Dollars, how do you convert American Dollars to Euros?

Back

To convert American Dollars to Euros, divide the amount in Dollars by the exchange rate (1.18 in this case).

Front

What is the ratio of cats to dogs if there are 3 cats for every 5 dogs?

Back

The ratio of cats to dogs is 3:5.

Front

If there are 25 dogs in a shelter with a cat-to-dog ratio of 3:5, how many cats are there?

Back

There are 15 cats.

Front

What is the formula to find the waiting time based on the number of people in line?

Back

Waiting time is directly proportional to the number of people in line.

Front

If 150 people wait 20 minutes, how long will 240 people wait?

Back

240 people will wait 32 minutes.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.

Front

How can you check if two ratios are equivalent?

Back

You can check by cross-multiplying and seeing if the products are equal.