It is currently 19 Nov 2017, 03:46

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Percentile question

Author Message
TAGS:

### Hide Tags

Intern
Joined: 05 Jun 2013
Posts: 6

Kudos [?]: [0], given: 1

### Show Tags

21 Jun 2013, 09:20
Hi

Could someone help me understand this from the OG?

In the following example, the increase is greater than 100percent:

***

If the cost of a certain house in 1983 was 300 percent of its cost in 1970, by what percent did the cost increase?

If n is the costin 1970, then the percent increase is equal to 3n - n / n = 2, or 200%.

***
Why is this? Is this just a matter of nomenclature?

If something is 300 percent of its cost, doesn't that mean it is its cost * 300 percent? -- or a 300 percent increase?

Or is "percent increase" just always expressed as delta (n) / n ? (in which case it is 3n - n / n, regardless of the nomenclature confusion.

Also does this matter for the test?
Thanks!

Kudos [?]: [0], given: 1

Director
Joined: 28 Jun 2011
Posts: 879

Kudos [?]: 245 [0], given: 57

### Show Tags

21 Jun 2013, 09:58
Lets take help of some numbers..

Initially the cost of the house was 100.

After that the cost increased to 300% which is 300.

Now Question is asking by what % did the cost increase?

Formula of change of %= (300-100)/100 *100= 200 or 200%.
_________________

Kudos [?]: 245 [0], given: 57

Re: Percentile question   [#permalink] 21 Jun 2013, 09:58
Display posts from previous: Sort by