Ratios Rates Proportions Percents

Front

What is a ratio?

Back

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

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two quantities with different units, such as speed (miles per hour) or price per item.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100, indicating how many parts out of 100.

Front

How do you find the total number of items when given a percentage?

Back

To find the total number of items, divide the number of items by the percentage (in decimal form) and multiply by 100.

Front

If 20% of a number is 4, what is the number?

Back

The number is 20, because 4 is 20% of 20.

Front

How do you calculate 24% of 300?

Back

Multiply 300 by 0.24 (24/100) to get 72.

Front

What does a ratio of 2:3 mean?

Back

It means for every 2 parts of one quantity, there are 3 parts of another quantity.

Front

If there are 12 boys in a class with a ratio of girls to boys as 2:3, how many girls are there?

Back

There are 8 girls in the class.

Front

How do you find 40% of 25?

Back

Multiply 25 by 0.40 (40/100) to get 10.