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total gmat math drill p25#4d explanation

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Intern
Joined: 19 Mar 2013
Posts: 31

Kudos [?]: 9 [0], given: 24

GPA: 3.78
total gmat math drill p25#4d explanation [#permalink]

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04 Apr 2013, 23:55
total gmat math drill p25#4d explanation

Is there an easy way to subract whole numbers and fractions from other whole numbers:

100 - 1 2/3 = 198 1/3

This was not intuitive to me - any suggestions welcome! Thanks

Kudos [?]: 9 [0], given: 24

Senior Manager
Status: Making every effort to create original content for you!!
Joined: 23 Dec 2010
Posts: 485

Kudos [?]: 2311 [0], given: 82

Location: United States
Concentration: Healthcare, Social Entrepreneurship
GMAT 1: 660 Q48 V34
GMAT 2: 750 Q49 V42
Re: total gmat math drill p25#4d explanation [#permalink]

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05 Apr 2013, 01:54
Policarpa wrote:
total gmat math drill p25#4d explanation

Is there an easy way to subract whole numbers and fractions from other whole numbers:

100 - 1 2/3 = 198 1/3

This was not intuitive to me - any suggestions welcome! Thanks

Hi Policarpa,

Yes there could be another way to solve such a question.

1 2/3 is the same as 1 + 2/3

Therefore we can express the given expression as

100 - (1 + 2/3 )

= 100 - 1 - 2/3

= 99 - 2/3

= $$\frac{(99*3 - 2)}{3}$$

= $$\frac{(297 - 2)}{3}$$

= $$\frac{295}{3}$$

Hope this helps,

Vercules
_________________

Kudos [?]: 2311 [0], given: 82

Re: total gmat math drill p25#4d explanation   [#permalink] 05 Apr 2013, 01:54
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total gmat math drill p25#4d explanation

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