Intro to Ratio Tables

​Ratio Tables

by Kellany Bennett

Multiple Choice

The ratio of cats to dogs at the Adopt a Pet agency is 2 to 3. There are 60 dogs at the agency. What is the total number of cats at the agency?

• 40

• 20

• 100

• 64

Multiple Choice

In one forest in England, a species of Moths appears in different forms. One form is black and the other form is gray. The ratio of black moths to gray moths is 2 : 7. If there are a total of 49 gray moths in the forest, how many black moths are in the forest?

• 14 Black Moths

• 68 Black Moths

• 42 Black Moths

• 7 Black Moths

Multiple Choice

Use equivalent ratios to find the unknown value.

• 3

• 5

• 30

• 35

Multiple Choice

Use equivalent ratios to find the unknown value.

• 36

• 4

• 3

• 63

Multiple Choice

Are these ratios equivalent?

2:3 and 8:12

• Yes

• No

Multiple Choice

Are these ratios equivalent?

3:4 and 6:12

• Yes

• No

PLEASE ACTUALLY WATCH THE VIDEOS.

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​If you do not have headphones or earbuds, use the closed captions from the CC button. Skipping the videos is NOT helpful and CAN result in missing questions you could have gotten right!!!

PLEASE ACTUALLY READ THE NOTES SLIDES.

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​If you do not read the slides due to laziness, it is YOUR FAULT if you do not get it because you didn't be responsible. Skipping the reading is NOT helpful and CAN result in missing questions you could have gotten right!!!

​Normally, we don't add for ratios. But, we can add a full ratio. If the first ratio is 1:24, we can repeatedly apply that rule by adding to extend the table.

​Think about what the next ratio would be... add 1 and add 24.

​The next ratio would be 6:144.

Multiple Choice

The table shows how fast Amy can walk on the treadmill. Based on this table, how many feet could Amy walk in 21 seconds?

• 48 feet

• 60 feet

• 72 feet

• 84 feet

Multiple Choice

Observe the table to find a pattern by adding the first ratio repeatedly. What is the next ratio at the bottom?

• 11:16

• 12:18

• 13:17

• 12:15

• 1

Multiple Choice

Observe the table to find a pattern by adding the first ratio repeatedly. What is the missing value?

• 30

• 16

• 15

• 20

Multiple Choice

Fill in the missing number into the ratio table

• 55
• 3
• 10
• 11

Multiple Choice

Complete the ratio table.

• 2

• 4

• 0

• 1

Multiple Choice

Complete the ratio table.

• 6

• 8

• 9

• 5

Ratio Tables

We use ratio tables as a way to display the information of several ratios in an easy to read way. We can use the tables to plug in only the key numbers that we need and get rid of some of the extra stuff.

How do we find the missing values in the tables?

We need to look for some sort of pattern in the table in order to determine the missing spots. Using the example to the right I can determine that all the numbers in the left column are multiples of 7, and all the numbers in the right are multiples of 5.

Finding a pattern:

So if we know that 7 x 2 = 14, that means we need can find the first blank by multiplying by the 5 x 2 to get 10.

Same with the second blank. We know 7 x 9 = 63, so we would do 5 x 9 to get 45.

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​One way to move up and down tables is to scale up or down by multiplying or dividing.

Multiple Choice

In the table, x represents the number of tickets sold and y represents the money they earn. How much money would they earn if they sold 100 tickets?

Hint: Look for relationships to scale up and down, like finding a way to multiply 5 up to 100.

• $175

• $225

• $400

• $500

Fill in the Blanks

Multiple Choice

What is the missing number in this table?

Hint: Find a relationship to scale up from 1 to 3 using multiplying.

• 3

• 6

• 12

• 9

Multiple Choice

To make coffee, one small scoop of coffee grounds is added to 2 cups of water. Use the ratio table to find how many cups of water to use for 5 scoops of coffee.

• 4 cups of water

• 6 cups of water

• 10 cups of water

• 8 cups of water

Multiple Choice

What number is missing?

• 7

• 3

• 10

• 5

Multiple Choice

Complete the ratio table

• 10, 35

• 12, 41

• 10, 41

• 10, 45

Multiple Choice

What is the missing number in this table?

• 10

• 25

• 50

• 35

Multiple Choice

What is the missing number in this table?

• 15

• 20

• 30

• 23

Another way to find missing numbers:

Another way I have found we can find missing numbers is finding a constant rate of change. For example, I have the first two numbers of each column given to me. I can see that if I take the number from column A and multiply it by 8, it gives me the answer for column B.

Multiple Choice

What is the value of C in the ratio table?

Hint: Can you find a multiplrule going ACROSS, like from 2 to 16?

• 80

• 24

• 96

• 92

Multiple Choice

What is the value of B in the ratio table?

Hint: Can you find a multiplying rule going ACROSS, like from 4 to 12?

• 3

• 9

• 2

• 6

Multiple Choice

What is the value of A in the ratio table?

Hint: Can you find a multiplying rule going across, like from 2 to 12?

• 84

• 7

• 28

• 82

Multiple Choice

What is the value of C in the ratio table?

• 72

• 64

• 96

• 128

Multiple Choice

What number is missing?

• 12
• 3
• 11
• 13

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks