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

What is the formula for finding the unit rate?

Back

The unit rate is found by dividing the total amount by the number of units, expressed as 'amount per unit'.

Front

If 8 slices of pizza cost $12, what is the cost per slice?

Back

$1.50 per slice.

Front

If a 12-ounce bottle of shampoo lasts 16 weeks, how long will an 18-ounce bottle last?

Back

24 weeks.

Front

In a ratio of cats to dogs of 3 to 5, if there are 25 dogs, how many cats are there?

Back

15 cats.

Front

What is 33% of 50?

Back

16.5.

Front

If there are 5 ice cream cones for every 3 brownies, how many cones are sold if 24 brownies are sold?

Back

40 ice cream cones.

Front

What does it mean to find a percentage of a number?

Back

Finding a percentage of a number involves multiplying the number by the percentage expressed as a decimal.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equivalent.