• NEW! FREE Beat The GMAT Quizzes
    NEW! FREE Beat The GMAT Quizzes
    NEW! FREE Beat The GMAT Quizzes
    Hundreds of Questions Highly Detailed Reporting Expert Explanations TAKE A FREE GMAT QUIZ
  • 7 CATs FREE!
    If you earn 100 Forum Points

    Engage in the Beat The GMAT forums to earn
    100 points for $49 worth of Veritas practice GMATs FREE

    Veritas Prep
    VERITAS PRACTICE GMAT EXAMS
    Earn 10 Points Per Post
    Earn 10 Points Per Thanks
    Earn 10 Points Per Upvote
    REDEEM NOW

Percentages

This topic has 4 member replies

Percentages

Post
Price of coal is up by 40%. Mr Amir must reduce the consumption by what percentage to remain at par. (source: Simplified Mathematics)

a) 60
b) 66
c) 2084
d) 60
e) 71.4

  • +1 Upvote Post
  • Quote
  • Flag
Master | Next Rank: 500 Posts Default Avatar
Joined
04 Oct 2011
Posted:
141 messages
Upvotes:
25
Post
shaifali84 wrote:
Price of coal is up by 40%. Mr Amir must reduce the consumption by what percentage to remain at par. (source: Simplified Mathematics)

a) 60
b) 66
c) 2084
d) 60
e) 71.4
Lets think initially the Price of Coal is 100$/Ton and Mr Amir uses 10Tonnes. Hence total value (initially) is 100x10 = 1000$

Now the Price of Coal is 140$/Ton and to remain at par, lets assume the consumption is "c".
Hence,

1000 = 140xc
100/14 = c
c=71.4.

Hence the is the reduced consumption percentage will be (100-71.4) = 38.6%. But I don't see this in the options.

  • +1 Upvote Post
  • Quote
  • Flag
Newbie | Next Rank: 10 Posts Default Avatar
Joined
08 Sep 2018
Posted:
3 messages
Post
yes, your answer is not the option in this question. The answer is 71.4, don't know how?

  • +1 Upvote Post
  • Quote
  • Flag
Senior | Next Rank: 100 Posts
Joined
04 Jun 2014
Posted:
53 messages
Followed by:
2 members
Upvotes:
6
Facebook Logo
Post
shaifali84 wrote:
Price of coal is up by 40%. Mr Amir must reduce the consumption by what percentage to remain at par. (source: Simplified Mathematics)

a) 60
b) 66
c) 2084
d) 60
e) 71.4
The options dont seem to make sense.

Let price be 100 then increased price is 140.By what percentage do we need to reduce this 140 so that it is equal to 100

40/140*100= 27%

_________________
If you want to fly,you have to give up the things that weighs you down!

PS

  • +1 Upvote Post
  • Quote
  • Flag
Senior | Next Rank: 100 Posts
Joined
04 Jun 2014
Posted:
53 messages
Followed by:
2 members
Upvotes:
6
Facebook Logo
Post
[quote="prabsahi"]
shaifali84 wrote:
Price of coal is up by 40%. Mr Amir must reduce the consumption by what percentage to remain at par. (source: Simplified Mathematics)

a) 60
b) 66
c) 2084
d) 60
e) 71.4
The options dont seem to make sense.
Lets assume we consume of 10 kg of $100 product.Now let the consumption be X after price is reduced to 140
100*10=140*x
X=1000/140=100/14=50/7=7.14

Now initial consumption was 10kg and new consumption is 7.14

So he should reduce by (10-7.14)/10 =apprx 30%

[color=]I think the last option is wrong.It seems the question maker has assumed
"Mr Amir must reduce the consumption by what percentage" as 7.14 but it should be[/color] 30%

_________________
If you want to fly,you have to give up the things that weighs you down!

PS

  • +1 Upvote Post
  • Quote
  • Flag
  • Varsity Tutors
    Award-winning private GMAT tutoring
    Register now and save up to $200

    Available with Beat the GMAT members only code

    MORE DETAILS
    Varsity Tutors
  • The Princeton Review
    FREE GMAT Exam
    Know how you'd score today for $0

    Available with Beat the GMAT members only code

    MORE DETAILS
    The Princeton Review
  • PrepScholar GMAT
    5 Day FREE Trial
    Study Smarter, Not Harder

    Available with Beat the GMAT members only code

    MORE DETAILS
    PrepScholar GMAT
  • e-gmat Exclusive Offer
    Get 300+ Practice Questions
    25 Video lessons and 6 Webinars for FREE

    Available with Beat the GMAT members only code

    MORE DETAILS
    e-gmat Exclusive Offer
  • Veritas Prep
    Free Veritas GMAT Class
    Experience Lesson 1 Live Free

    Available with Beat the GMAT members only code

    MORE DETAILS
    Veritas Prep
  • Target Test Prep
    5-Day Free Trial
    5-day free, full-access trial TTP Quant

    Available with Beat the GMAT members only code

    MORE DETAILS
    Target Test Prep
  • Kaplan Test Prep
    Free Practice Test & Review
    How would you score if you took the GMAT

    Available with Beat the GMAT members only code

    MORE DETAILS
    Kaplan Test Prep
  • EMPOWERgmat Slider
    1 Hour Free
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    EMPOWERgmat Slider
  • Economist Test Prep
    Free Trial & Practice Exam
    BEAT THE GMAT EXCLUSIVE

    Available with Beat the GMAT members only code

    MORE DETAILS
    Economist Test Prep
  • Magoosh
    Magoosh
    Study with Magoosh GMAT prep

    Available with Beat the GMAT members only code

    MORE DETAILS
    Magoosh

Top First Responders*

1 Ian Stewart 44 first replies
2 Jay@ManhattanReview 35 first replies
3 Brent@GMATPrepNow 34 first replies
4 Scott@TargetTestPrep 31 first replies
5 GMATGuruNY 18 first replies
* Only counts replies to topics started in last 30 days
See More Top Beat The GMAT Members

Most Active Experts

1 image description Scott@TargetTestPrep

Target Test Prep

129 posts
2 image description Max@Math Revolution

Math Revolution

89 posts
3 image description Ian Stewart

GMATiX Teacher

53 posts
4 image description Brent@GMATPrepNow

GMAT Prep Now Teacher

50 posts
5 image description Jay@ManhattanReview

Manhattan Review

35 posts
See More Top Beat The GMAT Experts