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Need help from native English speakers

 
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Jerry Chen



Joined: 26 Jan 2006
Posts: 115

PostPosted: Thu Feb 19, 2009 1:14 am    Post subject: Need help from native English speakers Reply with quote

Hello,

As the sentence says,

One pound is roughly equal to 0.5 kilograms.


Is the sentence OK?

is it 0.5 kilogram or 0.5 kilograms?

If "0.5 kilograms" is correct, I will become confused. Any rule to explain this?




Thanks for your help!
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Bob S.



Joined: 29 Apr 2004
Posts: 1767
Location: So. Cal

PostPosted: Thu Feb 19, 2009 10:07 am    Post subject: Re: Need help from native English speakers Reply with quote

Jerry Chen wrote:
One pound is roughly equal to 0.5 kilograms.

Is the sentence OK?
Yes, it is correct. You can say:
point five kilograms or half of a kilogram.
The general rule is: when saying a fraction less than one, you are saying it in reference to a single unit, so you use singular. When you use decimals, use plural.
e.g.
point seven five kilometers; three fourths of a kilometer, three quarters of a kilometer
point five liters; half of a liter
one point five liters; one and a half liters
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