Question

A study found that 9% of dog owners brush the dogs teeth. Of 578 dog owners, about how many would be expected to brush their dog’s teeth? explain.

Answer 1

52

Explanation:

Step 1: Our output value is 578.

Step 2: We represent the unknown value with
`x`.

Step 3: From step 1 above,
`578=100%`%

Step 4: Similarly, x=9%

Step 5: This results in a pair of simple equations:

578 = 100% (1)

x = 9% (2)

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

578/x = 100% /9%

Step 7: Again, the reciprocal of both sides gives

x/578 = 9 /100

⇒ x = 52.02

Therefore, 9% 578 is 52.02

Round:

Answer: About 52 dog owners are expected to brush their dogs teeth.