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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.
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06 Aug 2012, 06:10
Kudos
Bookmarks
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 \(270*\frac{4}{3}=90*4=360\).
