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#1 2008-10-19 09:54:22
- notsobright
- Member
- Registered: 2008-10-19
- Posts: 3
Percentages
Can you show me what the percentages for:
28 out of 150
14 out of 150
27 out of 150
4 out of 150
39 out of 150
8 out of 150
9 out of 150
21 out of 150
??
Thank you very much for your help!
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#2 2008-10-19 10:41:09
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: Percentages
In general, to convert a fraction into a percentage, you work out the decimal form and multiply that by 100.
28 out of 150 = 0.18666... and so that as a percentage is 18.6... %
There's a shortcut here though. In each case, you're dividing the first part by 150 and multiplying by 100, so that's the same as multiplying by 2/3.
28 * 2/3 = 18 2/3 = 18.6...
Why did the vector cross the road?
It wanted to be normal.
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