Ratio Tables

Ratio Tables

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.

Multiple Choice

What would be a pattern I could use here?

• Multiply the numbers in the left column by 5

• Multiply the numbers in the left column by 6

• Divide the numbers in the left column by 5

Multiple Choice

What is A?

• 84

• 7

• 28

• 82

Multiple Choice

What could I multiply column A by to equal column B?

• 9

• 8

• 7

• 2.5

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 C?

• 80

• 24

• 96

• 92

Multiple Choice

If Kevin is mixing 35 oz of yellow paint, he will need how many oz of red?

• 21 oz

• 24 oz

• 33 oz

• 18 oz

Multiple Choice

Complete the ratio table.

• 20 & 44

• 18 & 44

• 17 & 44

• 18 & 50

Multiple Choice

Complete the ratio table.

• 3

• 4

• 5

• 1

Multiple Choice

Which of the following tables use a 1:2 ratio?

Multiple Choice

Hilbert burns 120 calories per 30 minutes of weight training. Complete the table to chart his calorie expenditure for different amounts of time. What is value of b?

• b= 80

• b= 40

• b= 4

• b= 240

Multiple Choice

What number is missing?

• 7

• 3

• 10

• 5