Ms. Aboushanab Ratios and 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 write a ratio?

Back

Ratios can be written in three ways: using a colon (e.g., 2:3), as a fraction (e.g., 2/3), or with the word 'to' (e.g., 2 to 3).

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, you can use cross-multiplication. If a/b = c/d, then a*d = b*c.

Front

What is the ratio of dogs to all pets if there are 2 dogs, 4 cats, and 5 hamsters?

Back

The ratio of dogs to all pets is 2:11.

Front

If Jose swims 3 laps in 2 minutes, how long will it take him to swim 27 laps?

Back

It will take him 18 minutes.

Front

In a ratio of 3:5, if there are 30 tenants, how many cars are there?

Back

There are 50 cars.

Front

What is the ratio of green marbles to red marbles if there are 3 green marbles and 2 red marbles?

Back

The ratio is 3:2.

Front

If there are 4 red apples and 3 green apples, what is the ratio of red apples to green apples?

Back

The ratio is 4:3.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship between quantities.