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 #1 : 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 :
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