Ratios, Rates & Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor (GCF).

Front

What is 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.

Front

How do you find an equivalent ratio?

Back

To find an equivalent ratio, multiply or divide both terms of the ratio by the same non-zero number.

Front

If 5 pounds of concrete cost $40, how much does 1 pound cost?

Back

$8 per pound.

Front

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

Back

50 miles per hour.

Front

If a recipe requires 2 cups of sugar for 5 servings, how much sugar is needed for 1 serving?

Back

0.4 cups of sugar.

Front

What is the formula to calculate speed?

Back

Speed = Distance ÷ Time.

Front

If the ratio of red apples to green apples is 4:3, how many red apples are there if there are 12 green apples?

Back

16 red apples.