Solving Proportions

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

If 3/4 = x/16, what is x?

Back

x = 12.

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

If 50 apples cost $25, what is the cost of 1 apple?

Back

The cost of 1 apple is $0.50.

Front

If a car travels 120 miles in 3 hours, what is its speed in miles per hour?

Back

The speed is 40 miles per hour.

Front

What is the formula for finding the cost per item?

Back

Cost per item = Total cost / Number of items.

Front

If 5 ice cream cones are sold for every 3 brownies, what is the ratio of ice cream cones to brownies?

Back

The ratio is 5:3.

Front

How do you find the total cost of multiple items?

Back

Total cost = Cost per item x Number of items.

Front

If 75 apples cost $37.50, what is the cost of 1 apple?

Back

The cost of 1 apple is $0.50.