Ratios and Proportions

10 students want hotdogs for lunch and 26 want hamburgers.  What is the ratio of the number of students who want hot dogs to the number of students who want hamburgers?

• 26:10

• 10:26

• 10:36

• 25:36

What is the ratio of female teachers to male teachers?

• 5:13

• 13:5

• 18:10

• 26:5

There were 5 ice cream cones for every 3 brownies sold at the ice cream shop. If there were 24 brownies sold, how many ice cream cones were sold?

• 8

• 15

• 40

• 29

• 3
• 5.3
• 1.08
• 27

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90

What is a Ratio?

• Is a comparison of two quantities 

• To multiply two fractions 

• A number over another number

• Two decimals that can be multiplied

Solve the proportion:

• 4

• 8

• 14

• 10

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

The ratio 5:15 simplifies to...

• 1:3

• 3:1

• 1:5

• 3:5

Simplify the ratio 12:3

• 1:2

• 6:1

• 4:1

• 1:4