Ratios

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

Which represents the relationship of oranges to fruit?

• 2:6
• 2:4
• 4:6
• 4:2

There are 13 boys and 10 girls in the classroom.  What is the ratio of boys to girls?

• 10 to 13
• 23 to 13
• 13 to 10
• 23 to 10

What is the ratio of red circles to blue stars?

• 3:4
• 7/4
• 11/4
• 4 to 7

The math team has 12 boys, 10 girls, and one coach. What is the ratio of coaches to students?

• 22 to 1
• 1/10
• 1 to 22
• 1:12

Which is NOT a way to represent a ratio?

• As a fraction
• Using the word "to"
• With a colon (:)
• None.  All of these are ways to write a ratio.

The ratio of superheroes to villains was 2:3. Which statement describes this ratio?

• For every 3 heroes there were 2 villains.
• For every 2 heroes there were 3 villains. 
• There were 2 heroes and 3 villains.
• There were 5 people in total.

Tommy has a bag of LEGOS.  There are 6 yellow, 3 red, and 8 blue LEGOS.  What is the ratio in simplest form of red to yellow LEGOS?

• 1/2
• 6/3
• 2/1
• 3/6

The ratio of superheroes to villains was 2:3. Which statement describes this ratio?

• For every 3 heroes there were 2 villains.
• For every 2 heroes there were 3 villains. 
• There were 2 heroes and 3 villains.
• There were 5 people in total.

The pet shop has 2 dogs, 4 cats, and 5 hamsters. What is the ratio of dogs to all pets?

Use a colon (:) for your ratio!

(a)