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

Back

The ratio of ice cream cones to brownies is 5:3.

Front

If there are 24 brownies sold, how many ice cream cones are sold?

Back

If 5 cones are sold for every 3 brownies, then 40 ice cream cones are sold when 24 brownies are sold.

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

How do you find the cost per item?

Back

To find the cost per item, divide the total cost by the number of items.

Front

If a pizza has 8 slices and costs $12, what is the cost per slice?

Back

The cost per slice is $1.50.

Front

What is the formula for speed?

Back

Speed = Distance / Time.

Front

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

Back

The speed is 40 miles per hour.

Front

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

Back

Time = Distance / Speed.