Ratios, Rates, and Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Front

How do you calculate a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal, often used to solve for an unknown quantity.

Front

If a bakery makes 100 batches of cookies in 8 hours, how many batches do they make in 1 hour?

Back

12.5 batches of cookies.

Front

If a recipe requires 2 cups of milk for every 3 cups of flour, what is the ratio of milk to flour?

Back

The ratio of milk to flour is 2:3.

Front

If you have 18 cookies and the ratio of cookies to cupcakes is 6:5, how many cupcakes do you have?

Back

15 cupcakes.

Front

If Tyler hit 12 home runs in 7 games, how many home runs does he hit per game?

Back

1.71 home runs per game.

Front

If a recipe requires 4 cups of sugar for every 5 cups of flour, how much sugar is needed for 15 cups of flour?

Back

12 cups of sugar.

Front

What is the formula to find an unknown in a proportion?

Back

If a:b = c:d, then ad = bc.

Front

If a car travels 150 miles in 3 hours, what is its speed in miles per hour?

Back

50 miles per hour.