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

What is the formula for finding a unit rate?

Back

The unit rate is found by dividing the numerator by the denominator.

Front

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

Back

Speed = Distance/Time = 120 miles / 3 hours = 40 miles per hour.

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

Front

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

Back

15 cats.

Front

What is the simplest form of the ratio 10:15?

Back

The simplest form is 2:3.

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first number as the numerator and the second number as the denominator.

Front

What is the ratio of bones to frisbees if there are 10 frisbees and 8 bones?

Back

The ratio is 8:10, which simplifies to 4:5.

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.