Rate and Proportion Problems

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 variable.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

Are the ratios 3/4 and 6/12 equivalent?

Back

No, they are not equivalent because 6/12 simplifies to 1/2, which is not equal to 3/4.

Front

How do you determine the better buy between two products?

Back

Calculate the unit price for each product and compare them. The product with the lower unit price is the better buy.

Front

If 33 bags of potato chips cost $34.60, what is the cost of one bag?

Back

The cost of one bag is $34.60 ÷ 33 = $1.05.

Front

What is the unit rate?

Back

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

Front

How do you find the unit price of an item?

Back

Divide the total price by the number of units to find the price per unit.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc. You can use this to find the missing value.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities.