The number of students who don't have a learning disability is:

Using part over whole we get the percentage of students who don't have a learning disability as:

The value of the stock after the first year is 90% (0.9) of the value of the stock at time 0.

The value of the stock after the second year is 125% (1.25) of the value of the stock at the end of the first year.

The value of the investment today is:

Let  be Rob's salary.

Then, since Tim's salary is 10% less than Rob's salary, we can write Tim's salary as .

Since Peggy's salary is 20% less than Tim's salary, we can write Peggy's salary as .

Peggy's salary is 72% of Rob's salary as we can write:

Peggy salary/ Rob salary = 

Making the answer into a percent we get,

.

The number of accountants at the end of last year is:

The number of accountants at the end of this year is:

The approximate change in the number of accountants from the end of last year to the end of this year is:

There was a 43% decrease in the number of accountants over this period.

The number of students who did not vote is:

The percent of students who did not vote is therefore:

 of the students did not vote.

 is  of , so .

 is  of , so .

For  to be an integer,  must be a multiple of . Therefore, the smallest positive integer value of  is  itself;  is  of  is , and  is  of , or .

Add these to get

The correct response is thus "From 31 to 40 inclusive."

 is  of  and  of , so

 and .

Equivalently,  and 

 must be the least possible number divisible by both  and , so 

.

If  is  of , then .

Equivalently,

The percentage of women who have an income greater than  in the sample is simply the product of the percentage of women in the sample and the percentage of these women who earn more than .

The percentage of women who earn more than  in the sample is .

Or, we could assume there are  people in the sample. The number of women in the sample would then be . And the number of women who earn more than  in the sample would be .

The percentage of women who earn more than  in the sample is .

Let's verify this answer by taking another sample size, let's say there are  people in the sample.

The number of women who earn more than  in the sample would then be .

The percentage of women who earn more than  in the sample is .

We still get the same result because the number of people in the sample is not necessary to find that percentage since we are given the percentage of women in the sample and the percentage of these women in the sample who earn more than .

Assume there are  adults in the city.  of these adults are unemployed, which means the number of unemployed adults is  given there are  adults. Also,  of the adults in the city are unemployed women, so the number of unemployed adult women in the city is . We can then find the number of unemployed adult men in that city, which is .

At this point, we can calculate the percentage of unemployed adults in the city who are men: 

 of the unemployed adults in that city are men.