Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack
GMAT Club

 It is currently 28 Mar 2017, 01:29

### 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

# I would like to know any easier method to compare fractions.

Author Message
Intern
Joined: 20 Sep 2007
Posts: 4
Followers: 0

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

I would like to know any easier method to compare fractions. [#permalink]

### Show Tags

27 Sep 2007, 16:55
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

I would like to know any easier method to compare fractions. If I have 3 fractions, I can easily compare them by cross-multiplying. However, if I have like the following, what's the easiest way to compare?

Sort the following from least to greatest

9/17 3/13 2/3 3/16 19/20 5/7 2/9 7/15

The only way I currently know of is to compare 9/17 to all fractions then compare 3/13 to rest of the fractions and so on..This is very time consuming.
CEO
Joined: 29 Mar 2007
Posts: 2575
Followers: 20

Kudos [?]: 436 [0], given: 0

### Show Tags

27 Sep 2007, 17:50
jannam3000 wrote:
I would like to know any easier method to compare fractions. If I have 3 fractions, I can easily compare them by cross-multiplying. However, if I have like the following, what's the easiest way to compare?

Sort the following from least to greatest

9/17 3/13 2/3 3/16 19/20 5/7 2/9 7/15

The only way I currently know of is to compare 9/17 to all fractions then compare 3/13 to rest of the fractions and so on..This is very time consuming.

Aproximate.

3/16 is less than 4/16 which is 1/4 so 3/16 is about .18 or so.

2/9 is less than 3/9 which is 1/3. 2/9 (doing long division .22)

3/13 is less than 3/12 but greater than 3/15 so its inbetween .25 and .2

7/15 is a little less than half.

9/17 is a little more than half

2/3 is .666667

5/7 is a little more than 2/3

19/20 is obviously the greatest.

U gotta know values of key fractions.

1/6 1/4 1/3 1/2 2/3 3/4 4/3 5/4.

Also aproximating helps here: by doing aproximation u can at least organize certain fractions in some places for example:

3/16, 2/9 , 3/13 in least group. 7/15, 9/17, 2/3 ,5/7 in middle group

and lastly 19/20 as the obvious greatest # in the group.

From here u can again do some aproximations or long division to find out certain values.

Just from the first split into 3 groups, u can probably elimante some answer choices and then only have to figure out the decimal value of a few fractions.
CEO
Joined: 29 Mar 2007
Posts: 2575
Followers: 20

Kudos [?]: 436 [0], given: 0

### Show Tags

27 Sep 2007, 17:52
Also you should post this in the math forum.
27 Sep 2007, 17:52
Display posts from previous: Sort by