Writing and 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 unknown variable.

Front

If 13 candy bars weigh 26 ounces, what is the weight of one candy bar?

Back

2 ounces.

Front

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

Back

5:3.

Front

How do you set up a proportion to find the number of ice cream cones sold if 24 brownies were sold?

Back

Set up the proportion as 5/3 = x/24, where x is the number of ice cream cones.

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 of one.

Front

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

Back

40 miles per hour.

Front

How do you find the time it takes to travel a certain distance at a constant speed?

Back

Use the formula: Time = Distance ÷ Speed.

Front

If Mike takes 18 minutes to read 4 pages, how long does it take him to read 1 page?

Back

4.5 minutes.

Front

How do you find the total time to read multiple pages if you know the time for one page?

Back

Multiply the time for one page by the total number of pages.