### All GRE Math Resources

## Example Questions

### Example Question #1 : Percentage

What percentage of a solution is blood if it contains ml blood and ml water? Round to the nearest thousandth?

**Possible Answers:**

**Correct answer:**

Explanation:

First, you must find the total amount of solution. This is , or .

Now, the percentage of the solution that is blood can be represented:

, or

This is the same as % Rounded, it is %

### Example Question #2 : Percentage

What is the percentage increase of an account that began with a balance of and increased to ?

**Possible Answers:**

**Correct answer:**

Explanation:

Recall that the formula for percentage increase is:

, where is your ending value and is your starting value.

For our numbers, this would be:

Recall that to find a percentage from a decimal, you multiply by :

Sherry

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St. John's University, BA, Psychology. St. John's University, MA, Psychology.

Sandra

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University of Central Florida, Bachelors, Elementary Education. University of Central Florida, Masters, Elementary Education.