GRE Math : Whole and Part
Study concepts, example questions & explanations for GRE Math
All GRE Math Resources
Example Questions
Example Question #1 : How To Find The Part From The Whole
Quantitative Comparison
Quantity A: 10% of $45
Quantity B: 45% of $10
Quantity B is greater.
The two quantities are equal.
The relationship cannot be determined from the information given.
Quantity A is greater.
The two quantities are equal.
Quantity A: .1 * 45 = $4.50
Quantity B: .45 * 10 = $4.50
Therefore the two quantities are equal. This is always true: a% of $b = b% of $a.
Example Question #12 : Percentage
What percent of 5 is 
Example Question #823 : Gre Quantitative Reasoning
Quantity A:
Quantity B:
Which of the following is true?
A comparison cannot be detemined from the given information.
Quantity B is larger.
The two quantities are equal.
Quantity A is larger.
Quantity B is larger.
This type of problem is very easy. You merely need to translate the text into the form of an equation. For this, remember that "of" is translated as multiplication and "is" as equality. This gives us the following.
Quantity A:
Becomes...
Quantity B:
Becomes...
Therefore, quantity B is larger.
Example Question #824 : Gre Quantitative Reasoning
Quantity A:
Quantity B:
Which of the following is true?
The two quantities are equal.
Quantity B is larger.
Quantity A is larger.
A comparison cannot be detemined from the given information.
Quantity B is larger.
This type of problem is very easy. You merely need to translate the text into the form of an equation. For this, remember that "of" is translated as multiplication and "is" as equality. This gives us the following.
Quantity A:
Becomes...
Quantity B:
Becomes...
Therefore, quantity B is larger.
Example Question #825 : Gre Quantitative Reasoning
Quantity A:
Quantity B:
Which of the following is true?
A comparison cannot be detemined from the given information.
Quantity B is greater.
Quantity A is greater.
The two quantities are equal.
The two quantities are equal.
This type of problem is very easy. You merely need to translate the text into the form of an equation. For this, remember that "of" is translated as multiplication and "is" as equality. This gives us the following.
Quantity A:
Becomes...
Quantity B:
Becomes...
Therefore, the two quantities are equal.
Example Question #826 : Gre Quantitative Reasoning
A bag contains 
To solve this problem we must first find what percent of the money in the bag is in nickels. We know that combined, quarters and dimes make up 40% of the coins and that the rest are nickels. Therefore 60% of the money in the bag are nickels. We then multiply the total amount of coins in the bag with that percentage in order to find out how many nickels are in the bag. 
Example Question #827 : Gre Quantitative Reasoning
36 is what percent of 145
36%
403%
24.8%
40.3%
2.48%
24.8%
divide: 36/145 = 0.248; multiply by 100 to get percent
24.8%
Example Question #828 : Gre Quantitative Reasoning
36 is x% of 133. What is x
27
10
42
22.4
19
27
36 is x% of 133
that means that 36 = (x%)(133)
x% = 36/133 X 100 = 27%
Example Question #21 : Percentage
Max walks 1 mile in 15 minutes. Belinda takes only 12 minutes to walk 1 mile. If Max and Belinda leave their homes at the same time, how far has Belinda walked when Max has walked 1 mile?
4/3 mile
3/4 mile
5/4 mile
1 mile
3/2 mile
5/4 mile
Belinda walks faster than Max, so she should walk over a mile in the same time that Max walks 1 mile. We can eliminate the answer choices that aren't over a mile. It takes Max 3 minutes longer to walk a mile, so Belinda will walk for 3 more minutes after she finishes her first mile. If she walks 1 mile in 12 minutes, she walks 1/12 miles in 1 minute, or 3/12 = 1/4 mile in 3 minutes. So she walks 1 1/4 miles, or 5/4 miles.
Example Question #241 : Arithmetic
If 
Let's first pick numbers. If y = 25, x = 100. It's tempting to pick 25% as the answer, but x is greater than y, so the percentage must be greater than 100%. x is four times y, or 400% of y.
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