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06 Aug 2012, 05:50
Kudos
Bookmarks
Hello, I'm just beginning my road to the gmat and recently bought the set of manhattan study guides for help. I just started reading and taking notes on mgmat roadmap guide 0 when I came across a method I've never seen before. Unfortunately, the book does not explain how the method was done.
On page 61 Chapter 3 the book is talking about approximate math and using an example of \(273/0.77=270/0.75=270*4/3=270+(270/3)=270+90=360\).
The part that has me scratching my head is where the book goes from \(270*4/3\) to \(270+(270/3)\). Does anyone know how this work? Maybe I've forgotten more than I thought in the last four years after college
Thanks in advance for any replies.
-Matt
On page 61 Chapter 3 the book is talking about approximate math and using an example of \(273/0.77=270/0.75=270*4/3=270+(270/3)=270+90=360\).
The part that has me scratching my head is where the book goes from \(270*4/3\) to \(270+(270/3)\). Does anyone know how this work? Maybe I've forgotten more than I thought in the last four years after college
Thanks in advance for any replies.
-Matt
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
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06 Aug 2012, 06:10
Kudos
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EvaJager
Though there is nothing wrong with their approach it's still a bit strange why they are going from \(270*\frac{4}{3}\) to \(270*\frac{4}{3}=270(1+\frac{1}{3})=270+\frac{270}{3}=270+90=360\), when we could directly reduce 270 by 3 in \(270*\frac{4}{3}\) and write \(270*\frac{4}{3}=90*4=360\).
