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# ((-1.5)(1.2)-(4.5)(0.4))/30

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BSchool Forum Moderator
Joined: 05 Jul 2017
Posts: 471
Location: India
GMAT 1: 700 Q49 V36
GPA: 4

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07 Jul 2018, 01:22

I think you are more confused because 0.4 is rounded to 0.5 whereas all other numbers (Eg: - 1.2 was rounded to 1) followed a different logic while rounding them up?

Think of it this way, 0.4 if it is rounded to 0, then the entire second half of the equation will become 0. Then the answer will be pretty inaccurate.

Hence I think we shouldn't reduce it to zero. Rather keep it as is or make it 0.5

Hope this helps
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Target Test Prep Representative
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2781

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13 Jul 2018, 14:13
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

$$\frac{(-1.5)(1.2)-(4.5)(0.4)}{30}$$

(A) -1.2
(B) -0.12
(C) 0
(D) 0.12
(E) 1.2

Simplifying we have:

(-1.8 - 1.8)/30 = -3.6/30 = -36/300 = -0.12

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Jeffery Miller

GMAT Quant Self-Study Course
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Re: ((-1.5)(1.2)-(4.5)(0.4))/30 &nbs [#permalink] 13 Jul 2018, 14:13

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