GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 17 Oct 2019, 20:56

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

(Fraction)Over the course of a year...

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
B
Joined: 07 Feb 2018
Posts: 1
(Fraction)Over the course of a year...  [#permalink]

Show Tags

New post 10 Jan 2019, 20:58
Don’t know how to make a equation. It will be really grateful if you guys teach me.

Q. Over the course of a year a certain factory increased its output by 90 percent. At the same time it decreased its total working hours by 20 percent. By what percent did this factory increase its output per hour?

A. 70%
B. 110%
C. 112.5%
D. 137.5%
E. 237.5%




Sent from my iPhone using GMAT Club Forum mobile app
Veritas Prep GMAT Instructor
User avatar
V
Joined: 16 Oct 2010
Posts: 9705
Location: Pune, India
Re: (Fraction)Over the course of a year...  [#permalink]

Show Tags

New post 10 Jan 2019, 21:25
JUNGWOOLEE wrote:
Don’t know how to make a equation. It will be really grateful if you guys teach me.

Q. Over the course of a year a certain factory increased its output by 90 percent. At the same time it decreased its total working hours by 20 percent. By what percent did this factory increase its output per hour?

A. 70%
B. 110%
C. 112.5%
D. 137.5%
E. 237.5%


Sent from my iPhone using GMAT Club Forum mobile app


Output/Hour = Total Output / Total time in hrs

New Output/Hour = Total Output*(190/100) / Total time in hrs (80/100) = (Output/Hour) *(19/8)

(New Output/Hour) / (Output/hour) = 19/8

This is an increase of 11/8 i.e. (11/8)*100 = 137.5%
_________________
Karishma
Veritas Prep GMAT Instructor

Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58402
Re: (Fraction)Over the course of a year...  [#permalink]

Show Tags

New post 10 Jan 2019, 22:16
JUNGWOOLEE wrote:
Don’t know how to make a equation. It will be really grateful if you guys teach me.

Q. Over the course of a year a certain factory increased its output by 90 percent. At the same time it decreased its total working hours by 20 percent. By what percent did this factory increase its output per hour?

A. 70%
B. 110%
C. 112.5%
D. 137.5%
E. 237.5%




Sent from my iPhone using GMAT Club Forum mobile app


Proper version of this question is here: https://gmatclub.com/forum/over-the-cou ... 89373.html

Rules of posting on the forum: https://gmatclub.com/forum/rules-for-po ... 33935.html
_________________
GMAT Club Bot
Re: (Fraction)Over the course of a year...   [#permalink] 10 Jan 2019, 22:16
Display posts from previous: Sort by

(Fraction)Over the course of a year...

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne