Hey, how is going everybody!
Could anybody tell me the meaning of one-half?Does it mean half of or half and one of a certain number. Here is the context:
"These demographic features have reduced Ireland's population by one-half during the past 100 years"

Any responses from you will be highly appreciated! Thank you!
Yes, you could do that!
Means reduced to 50% what it was actually.
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Could I just replace one-half with "half" which also means 50%?

 CalifJim's reply was promoted to an answer.