Solve for X Ratios and Proportions

Cindy’s job is to check computer printers for defects. Out of 420 printers she has to check, only 3 of the first 84 have been defective. Using this information, what is the best prediction of the TOTAL NUMBER OF DEFECTIVE PRINTERS?(Set up your ratio)

If a class has 14 redheads, 8 brunettes, and 6 blondes- What is the REDUCED ratio of blondes to brunettes?

• 3:4

• 8:6

• 6:8

• 4:3

• 2
• 4
• 1
• 3

Solve for x:     6/12 = x / 6

• 36

• 2

• 12

• 3

Solve for x:   x/4 = 6/8

• 4

• 2

• 3

• 10

Solve for A in the table.

• 40

• 10

• 9

• 45

• 1
• 3
• 9
• 8

Solve the proportion:

• 4

• 8

• 14

• 10

Solve for the unknown in the equivalent ratios.
3/4 = 9/?

• 8

• 10

• 4

• 12

In my fish tank, the ratio of red fish to blue fish is 3:5. There are 20 blue fish. How many red fish are there?

• 18

• 12

• 4

• 15