fraction

US /ˈfræk.ʃən/
UK /ˈfræk.ʃən/
"fraction" picture
1.

a small part or proportion of something

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Only a small fraction of the population attended the meeting.
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He completed the task in a fraction of the time expected.
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portionsegmentbitpiecefragment
2.

a numerical quantity that is not a whole number (e.g., 1/2, 3/4)

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He explained how to add and subtract fractions.
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The recipe calls for half a cup, which is a simple fraction.
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ratioquotient