Two-fifths

Agriculture accounts for one-fifth of output and two-fifths of employment.

Source: tatoeba (8904901)

The World Health Organization estimates that 2.5 billion people — more two-fifths of the world's population — are at risk of infection with Dengue fever, a mosquito-borne illness that in its worst form can cause death.

Source: tatoeba (12151891)

It provides for the sale of four-fifths of certain land, while the mortgagor owned only two-fifths, and the decree was so drawn as to lead to an inference that the intention was that a two-fifths interest belonging to the plaintiff should be sold in connection with the mortgagor's interest.

Source: wiktionary

If only an emulsion be required, a solution of rubber in benzine or other hydrocarbon, to which a small portion of alcohol has been added, is mixed by vigorous agitation with a two-fifths saturated solution of borax previously heated to about 120° to 140° Fahr., and the agitation must be continued—preferably by mechanical means, but not of too violent a character—until the mixture has cooled down to the temperature of the air, or nearly so.

Source: wiktionary