BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Percentages

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 966
Joined: Sat Jan 02, 2010 8:06 am
Thanked: 230 times
Followed by:21 members

Percentages

by shankar.ashwin » Sat Nov 05, 2011 12:21 am
A certain juice manufacturer increased the number of ounces in Product N by 25 percent but did not change the price. What was the resulting percent decrease in the price per ounce of Product N?

(A) 10%
(B) 20%
(C) 25%
(D) 30%
(E) 35%
Top
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 20
Joined: Sun Apr 17, 2011 7:16 am
Followed by:1 members

by chaitanyabhansali » Sat Nov 05, 2011 12:55 am
IMO : B (20%)
What's the answer, btw?
Top
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Sat Nov 05, 2011 2:30 am
Initially,
Let 100 ounces = $100
$1 per ounce

After increase in number of ounces,
125 ounces = $100
$100/125 per ounce

% decrease in price per ounce = [(1 - 100/125) / 1] * 100 = (1/5) * 100 = 20 %

Option B
Top
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pm
Location: New York, NY
Thanked: 13060 times
Followed by:1906 members
GMAT Score:790

by GMATGuruNY » Sat Nov 05, 2011 4:12 am
shankar.ashwin wrote:A certain juice manufacturer increased the number of ounces in Product N by 25 percent but did not change the price. What was the resulting percent decrease in the price per ounce of Product N?

(A) 10%
(B) 20%
(C) 25%
(D) 30%
(E) 35%
4 ounces at $5 per ounce = 4*5 = $20.
The number of ounces increased by 1/4 = 4 + (1/4)4 = 5.
5 ounces at the same price = 20/5 = $4 per ounce.
Percent decrease in price per ounce = (5-4)/5 * 100 = 20%.

The correct answer is B.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Post new topic Post Reply
• Page 1 of 1