Writing & Solving Proportions

Front

What is a proportion?

Back

Front

How do you solve a proportion?

Back

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit of another quantity.

Front

If 2 US Dollars is equivalent to 38.5 Mexican Pesos, what is the unit rate in US Dollars per Peso?

Back

The unit rate is @@rac{2}{38.5} ext{ US Dollars per Peso} ext{ or approximately } 0.0519 ext{ US Dollars per Peso}.$$

Front

How do you convert currency using proportions?

Back

To convert currency, set up a proportion using the known exchange rate and the amount you want to convert. Then solve for the unknown.

Front

If Kara earned $81 for 12 hours, how much does she earn per hour?

Back

Front

How do you find the total amount earned based on hours worked?

Back

Multiply the hourly wage by the number of hours worked. For example, if the hourly wage is 6.75 and she worked 40 hours, then total earnings = 6.75 * 40 = 270 US Dollars.

Front

What is the relationship between the number of cookies and cups of flour in a recipe?

Back

The relationship is a proportional relationship. If 3 cups of flour make 24 cookies, then the number of cups needed increases as the number of cookies increases.

Front

If it takes 3 cups of flour to make 24 cookies, how many cups are needed for 60 cookies?

Back

Front

What does it mean for dimensions of rectangles to be proportional?

Back

It means that the ratios of the corresponding sides of the rectangles are equal.