Meaning of FRACTION in English

frac ‧ tion /ˈfrækʃ ə n/ BrE AmE noun [countable]

[ Date: 1300-1400 ; Language: Late Latin ; Origin: fractio , from Latin fractus , past participle of frangere 'to break' ]

1 . a very small amount of something

fraction of

I got these shoes at a fraction of the original price.

She paused for a fraction of a second.

2 . a part of a whole number in mathematics, such as ½ or ¾

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.