Ratio and Proportion

Patrick has 2 black, 3 red, and 5 white toy cars. What is the ratio of red toy cars to all the toy cars?

• 3:5

• 1:3

• 3:11

• 3:10

Which is NOT equivalent to 3:5?

• 15:25

• 9:15

• 21:28

• 30:50

What are the three ways to write a ratio

• 2;3 , 2 to 3 , 2\3

• 2:3 , 2 to 3 , 2/3

• 2:3 , 2 too 3 , 2/3

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

• up (multiply)

• down (divide)

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 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

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

Determine if the ratios are proportional.
4/5 and 15/20

• Yes

• No

What is the most important thing you need to know about ratio and rate?

• The order of the numbers matters.

• The bigger number always go first

• You can't compare two different units.

• Unit rates are always ratios with the number "2" as the second number.

To find the height of a very tall pine tree, you measure your shadow and the tree's shadow.  How tall is the tree?

• 144 feet

• 72 feet

• 36 feet