Ratios

Ratios

What are Ratios????

What exactly is a ratio?

• How you describe the relationship in a group?

• Real World Example: How we describe the relationship between how many shirts to pants in the closet

How do ratios look?

Ratio is expressed with a : between the two numbers.

Example:
11 students to 2 teachers
11:2

Ratios can also be shown as a fraction

 $\frac{11}{2}$  

Open Ended

Lets try it!

How many boys to girls?

Now what if they ask us how many pieces to a total amount?

Remember total means sum or add.

So how would we find the how the ratio of boys to total students in the class?

Open Ended

What is the ratio of girls to total number of students?

Multiple Choice

There are 20 seats and 18 students. What is the ratio of seats to students?

• 20:38

• 20:18

• 18:20

• 18:38

Multiple Choice

There are 20 kids and 18 teachers. What is the ratio of kids to total number of people?

• 20:18

• 20:48

• 20:38

• 18:20

Multiple Choice

There are 15 jackets and 10 sweatpants in the closet. What is the ratio of jackets to sweatpants?

• 15:10

• 15:25

• 10:15

• 25:15

Multiple Choice

There for 5 pairs of pants and 11 shirts. What is the ratio of pants to shirts?

• 5:11

• 10:20

• 11:50

• 1:2

Multiple Choice

There are 5 pairs of pants and 11 shirts. What is the ratio of shirts to total number of clothes?

• 5:11

• 11:16

• 11:5

• 20:5

What if it ask me how many more times something is to something else?

• You simply just divide the one they ask for by the other one

• Example: There are 10 students to 2 teachers. How many more times are there students than teachers?

Multiple Choice

There are 5 cats to 10 dogs. How many more dogs are there than cats.

• 2

• .5

• 15

• 5

Multiple Choice

There are 5 cats and 10 dogs. What is the fraction of cats to the total amount of animals.

• $\frac{10}{5}$

• $\frac{5}{10}$

• $\frac{5}{15}$

• $\frac{10}{15}$

Multiple Choice

There are 5 cats and 10 dogs. What is the fraction of dogs to the total amount of animals.

• $\frac{10}{5}$

• $\frac{5}{10}$

• $\frac{5}{15}$

• $\frac{10}{15}$

You did it!

Now that you understand lets get on Get More Math and keep practicing.