GMAT Prep: Percentage

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chetanojha: Master | Next Rank: 500 Posts; Posts: 125; Joined: Sun Sep 16, 2007 1:38 pm; Thanked: 6 times

by chetanojha » Sun May 03, 2009 1:11 am

Please help me to understand this.

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Source: Beat The GMAT — Problem Solving | Sun May 03, 2009 1:11 am

humans: Junior | Next Rank: 30 Posts; Posts: 14; Joined: Mon Jul 23, 2007 12:49 am

by humans » Sun May 03, 2009 5:32 am

Let x be the amount of purchase

3% of x = 12 gives x = 400

8% of 400 = 32. So amount she paid is 400 + 32 = 432

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