Ratios

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 simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What does part-to-part ratio mean?

Back

A part-to-part ratio compares two different parts of a whole, such as the number of apples to oranges.

Front

What does part-to-whole ratio mean?

Back

A part-to-whole ratio compares a part of a quantity to the entire quantity, such as the number of red apples to the total number of apples.

Front

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

Back

There are 9 green apples.

Front

What is the ratio of 6th graders to 7th graders if there are 32 6th graders and 8 7th graders?

Back

The ratio is 4:1.

Front

If you earn $15 every 3 weeks, how much do you earn in 1 week?

Back

You earn $5 in 1 week.

Front

How do you find the total amount earned over a period of time using ratios?

Back

Multiply the amount earned in a known time period by the number of time periods.

Front

Jose swims 3 laps in 2 minutes. How many laps can he swim in 10 minutes?

Back

He can swim 15 laps in 10 minutes.

Front

What is the ratio of 3 red balls to 5 blue balls?

Back

The ratio is 3:5.