Ratio, Rate, and Percentage Review

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 divisor (GCD).

Front

If a recipe calls for a ratio of 2:3 for sugar to flour, how much flour is needed for 4 cups of sugar?

Back

6 cups of flour (since 4 cups of sugar corresponds to 6 cups of flour in the ratio).

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 price per item.

Front

How do you convert a ratio to a percentage?

Back

To convert a ratio to a percentage, divide the first number by the total of both numbers and multiply by 100.

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100.

Front

If 20% of a number is 50, what is the number?

Back

The number is 250 (since 50 is 20% of 250).

Front

How do you find the equivalent ratio of 8:14?

Back

Divide both terms by their GCD, which is 2, resulting in the equivalent ratio of 4:7.

Front

If the ratio of cats to dogs is 3:5 and there are 15 cats, how many dogs are there?

Back

25 dogs (since 15 cats corresponds to 25 dogs in the ratio).

Front

What is the formula to find the percentage of a number?

Back

Percentage = (Part/Whole) x 100.