Welcome! Check out our free B-School Guides to learn how you compare with other applicants.

Fraction question from OG 11

This topic has 4 member replies
maxim730 Rising GMAT Star
Joined
26 Dec 2006
Posted:
76 messages
Followed by:
1 members
Fraction question from OG 11 Wed Mar 14, 2007 4:11 am
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
I have a simple math question that I'm trying to convert to a formula

OG11, problem 155 from DS:

Q:...if 3 liters of water are added to the bucket when it is half full of water, the amount of water in the bucket will increase by 1/3..

when they explain the answer they do so this way:

Q: "when 3 liters are added, the volume of water will increase by 1/3, which is equivalent to multiplying the present value by 4/3"
3 + 1/2c = 4/3(1/2c)

I understand the 3 + 1/2c.

My question to you is.. how is the 4/3 part equivalent to the "increasing by 1/3" part??

Can anyone give me a simple example demonstrating their reasoning? I'm a bit confused.. I tried to set up a sample problem using the above method but wasn't able to.

Thanks!!

Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
aim-wsc GMAT Titan
Joined
20 Apr 2006
Posted:
2472 messages
Followed by:
10 members
Thanked:
75 times
Target GMAT Score:
801-
Wed Mar 14, 2007 4:30 am
maxim730 wrote:
Q: "when 3 liters are added, the volume of water will increase by 1/3, which is equivalent to multiplying the present value by 4/3"
since you couldnt get OG explanation, let me use other method.

when u add 1/3 (ie 0.33) into somethin u actually multiply original value by 1.33. that means 1+1/3 = 4/3

hope this helps

_________________
Getting started @BTG?

Please do not PM me, (not active anymore) contact Eric.

gabriel GMAT Destroyer!
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
Thanked:
49 times
Wed Mar 14, 2007 4:38 am
maxim730 wrote:
I have a simple math question that I'm trying to convert to a formula

OG11, problem 155 from DS:

Q:...if 3 liters of water are added to the bucket when it is half full of water, the amount of water in the bucket will increase by 1/3..

when they explain the answer they do so this way:

Q: "when 3 liters are added, the volume of water will increase by 1/3, which is equivalent to multiplying the present value by 4/3"
3 + 1/2c = 4/3(1/2c)

I understand the 3 + 1/2c.

My question to you is.. how is the 4/3 part equivalent to the "increasing by 1/3" part??

Can anyone give me a simple example demonstrating their reasoning? I'm a bit confused.. I tried to set up a sample problem using the above method but wasn't able to.

Thanks!!
..... consider a number 100.... ur asked to increase it by 1/3rd.... the way to do it is add 100*1/3 to 100.... therefore the answer is 100+100/3.... which is equal to 100 ( 1+1/3) ... solve the bracket and u get 100*4/3... hope that helps...

gabriel GMAT Destroyer!
Joined
20 Dec 2006
Posted:
986 messages
Followed by:
1 members
Thanked:
49 times
Wed Mar 14, 2007 4:42 am
double post... ignore....

maxim730 Rising GMAT Star
Joined
26 Dec 2006
Posted:
76 messages
Followed by:
1 members
Wed Mar 14, 2007 6:25 am
Makes total sense. Thanks guys. So its like % increase

Best Conversation Starters

1 varun289 43 topics
2 greenwich 30 topics
3 sana.noor 21 topics
4 guerrero 20 topics
5 killerdrummer 19 topics
See More Top Beat The GMAT Members...

Most Active Experts

1 Brent@GMATPrepNow

GMAT Prep Now Teacher

202 posts
2 GMATGuruNY

The Princeton Review Teacher

143 posts
3 Anju@Gurome

Gurome

134 posts
4 Jim@StratusPrep

Stratus Prep

86 posts
5 David@VeritasPrep

Veritas Prep

41 posts
See More Top Beat The GMAT Experts