Fifth in a sentence as a noun

However, when you are 50 years old, one year has reduced to only 2% of your life, and hence seems only one-fifth as long.

An annual lease on a machine of this type is usually about a fifth of its purchase cost, so let's be generous and call it $70,000 per year.

Fifth in a sentence as an adjective

Technically the fifth amendment was abandoned the Minute the US began imprisoning/killing people without trials.

Sort of off-topic and I've harped on this before, but when I search "google maps" in the app store, it's the fifth search result!As a developer in the App Store, I really hope they do something to fix the abysmal searches in it.

Fifth definitions

noun

a quantity of liquor equal to one fifth of a United States gallon

noun

position five in a countable series of things; "he was fifth out of several hundred runners"

noun

one part in five equal parts

See also: one-fifth

noun

the musical interval between one note and another five notes away from it

adjective

coming next after the fourth and just before the sixth in position