2 Bible Verses about Fractions, One Tenth

It was this Melchizedek, King of Salem and Priest of the Most High God, who met Abraham returning from the slaughter of the kings and blessed him; and it was to him that Abraham apportioned a tithe of all the spoil. He was first, as his name signifies, King of righteousness, and then King of Salem, that is, King of Peace; without father or mother, without lineage, having neither beginning of days nor end of life, but resembling the Son of God, he remains a priest in perpetuity.read more.
But observe how great this man was, to whom even Abraham, the Patriarch, gave a tenth part of the spoils. Now those of the sons of Levi who are appointed to the priesthood, are authorized by the Law to take tithes of the people, that is, of their brothers, and that too, although these are descended from Abraham. But this man who had no Levitical genealogy actually took tithes of Abraham, and blessed him to whom the promises belong. Now it is beyond all controversy that the inferior is always blessed by the superior. Again it is mortal men who receive tithes in the one case; while in the other it is he of whom it is attested, "He lives." And even Levi, who is the receiver of tithes, so to speak, paid tithes through Abraham; for Levi was yet in the loins of his father, when Melchizedek met Abraham.

"Woe unto you, Scribes and Pharisees, hypocrites! For you tithe mint and anise and cummin, and neglect the weightier matters of the Law??ustice and mercy and good faith; these latter you ought to have done, and not to have left the former undone.