Ratio

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

If I have the following ratio, do I need to scale up or down?
1                 2
---  =         ----
3               ?

• up (multiply)
• down (divide)

What is the ratio to the picture shown, triangles to squares?

• 2:6
• 5:6
• 3:4
• 4:3

Is the following ratio part to part or part to whole?
5 out of 23 kids in a class play trumpet

• Part to part
• Part to whole

If there are 5 soccer players, 10 baseball players, and 15 basketball players, what is the ratio of baseball players to soccer players?

• 1 to 2
• 1 to 3
• 2 to 1
• 3 to 1

If the rangers won 100 games and lost 60, what is the simplified ratio of wins to losses?

• 10 to 6
• 5 to 3
• 6 to 10
• 3 to 5

**PROPORTION***
If mike has a ratio of 2 apples to 3 bananas, how many apples would you expect him to have if he has 15 bananas?

• 7
• 9
• 10
• 2

***PROPORTION***
Jose swims 3 laps in a pool every 2 minutes. How long would it take him to swim 27 laps?

• 8 minutes
• 9 minutes
• 16 minutes
• 18 minutes

A bag of marbles comes with 3 blue marbles, 2 red marbles, and 5 yellow marbles. What is the ratio of red to yellow?

• 2 to 5
• 5 to 3
• 3 to 5
• 5 to 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