ADJ. large, significant, sizeable, substantial | mere, small, tiny A mere fraction of available wind energy is currently utilized.
PREP. ~ of Why not grow your own fruit at a fraction of the price?
PHRASES just/only a fraction The average income is high, though many people earn just a fraction of that average.
2 exact part of a number
ADJ. vulgar | decimal | improper 11/8 is an improper fraction, equivalent to one and three-eighths.
VERB + FRACTION express sth as Express 25% as a fraction.