Source: Official Guide for the GMAT 13th Ed. Problem Solving; #199 Official Guide for the GMAT 2015 14th Ed. Problem Solving; #199

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0.99999999/1.0001-0.99999991/1.0003=

0.99999999/1.0001-0.99999991/1.0003=

2 Explanations

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Delia Wang

You could also express each fraction as a subtraction of some small number from 1, giving you - 10001/100010000 + 30009/100030000 = 3/10000 - 1/10000 = 2/10000.

Jun 11, 2017 • Comment

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Gravatar Mike McGarry, Magoosh Tutor

Dec 28, 2013 • Comment

Sergey Volchematiev

You could have used the same trick of the squares difference in the second fraction as well.

Nov 2, 2014 • Reply

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Section 5.3 Problem Solving

Section 5.3 Problem Solving

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