Introduction to Ratio

What is a ratio?

• A comparison of two or more things by addition

• A comparison of two or more things by multiplication

• A comparison of two or more things by subtraction

• A comparison of two or more things by division

On a human, what is the ratio of arms to fingers?

• 10:2

• 2:10

• 2:5

• 5:1

What is the ratio of days of the week that start with the letter T to all days of the week?

• 7: 5

• 2:7

• 7:2

• 5:7

What is the ratio of total heads to total legs?

• 4:16

• 4:8

• 2:4

• 16:4

There are 4 birds and 6 snakes. What is the ratio of birds to snakes?

• 6/4
• 4/6
• 1/3
• 10/16

Which of the following options is a real life example of a ratio?

• 12 noodles
• 4 meatballs : 1 cup of sauce
• 1 jar of sauce
• 15 desserts

Write the ratio as a fraction in simplest form.
15 girls to 6 boys    

• 5 to 2
• 5/3
• 3 to 5
• 5/2

Jenny has 3 guitars. Steve has 4 guitars. If the ratio of guitars is 4:3, who is first in the ratio?

• Jenny
• Steve
• It doesn't matter
• Les Paul

What is a Ratio?

• Is a comparison of two quantities

• To multiply two fractions

• Strictly a fraction

• Two decimals that can be multiplied

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12