CFA - Ratio 6.1*

Front

What is a ratio?

Back

A ratio is a relationship between two numbers that shows how many times the first number contains the second.

Front

How do you write a ratio?

Back

A ratio can be written in three ways: using a colon (e.g., 3:5), as a fraction (e.g., 3/5), or with the word 'to' (e.g., 3 to 5).

Front

What does the ratio 3:5 represent in a real-world context?

Back

It can represent the relationship between two quantities, such as the number of boys to girls in a class.

Front

If there are 3 cats and 5 dogs, what is the ratio of cats to dogs?

Back

The ratio of cats to dogs is 3:5.

Front

What is the ratio of gray circles to black circles if there are 5 gray circles and 4 black circles?

Back

The ratio is 5:4.

Front

How can you find the total number of items in a ratio?

Back

Add the parts of the ratio together. For example, in the ratio 3:5, the total is 3 + 5 = 8.

Front

If John has 2 white circles and 3 black circles, how many black circles must he add to have a ratio of 3:1?

Back

He must add 2 black circles.

Front

What is the ratio of wood boats to fiberglass boats if there are 75 wood boats and 65 fiberglass boats?

Back

The ratio is 75:65.

Front

How do you simplify a ratio?

Back

Divide both sides of the ratio by their greatest common divisor (GCD). For example, 8:12 simplifies to 2:3.

Front

What is the relationship between the number of red calculators and blue calculators if the ratio is 14:8?

Back

For every 14 red calculators, there are 8 blue calculators.