thinkpink25 wrote:

Hey guys,

I started studying for the GMAT and I was wondering how do you know how many zeros to add when doing long division to covert fraction into a percent. For example 3/8 you would divide 8 by 3.000 but 1/4 you only divide 4 by 1.00. Could someone explain that to me please? Thank you

Check out this post on relation between percents and fractions:

http://www.veritasprep.com/blog/2011/02 ... rcentages/When you say 50%, it represents 50/100 (percent means per cent i.e. per 100 i.e. /100)

So 50% means 50 out of every 100 which is 1 out of every 2.

50/100 = 1/2

Similarly, when you want to convert 1/4 to percent, you are saying 1 out of every 4 so how many out of every 100?

1/4 = x/100

x = 25

Hence, 1/4 = 25/100 = 25%

Similarly, when you convert 3/8 to percent,

3/8 = x/100

x = 37.5

Hence, 3/8 = 37.5%

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