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 two ratios and set the products equal to each other.

Front

If 4 big water bottles hold 8 gallons, how much does 1 bottle hold?

Back

1 big water bottle holds 2 gallons.

Front

If 3 big water bottles hold 6 gallons, how much does 1 bottle hold?

Back

1 big water bottle holds 2 gallons.

Front

What is the unit rate?

Back

The unit rate is a comparison of any two units in which the second unit is 1.

Front

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

Back

The cost per slice is $1.50.

Front

How do you find the total cost from a unit rate?

Back

Multiply the unit rate by the total number of units.

Front

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

Back

The speed is 40 miles per hour.

Front

If a car travels at 40 miles per hour, how long will it take to travel 200 miles?

Back

It will take 5 hours.

Front

What is the cost of 50 apples if they cost $25.00?

Back

The cost of 1 apple is $0.50.