2 Bible Verses about Fractions, One Tenth

For this man, Melchizedek, King of Salem and priest of the Most High God--he who when Abraham was returning after defeating the kings met him and pronounced a blessing on him-- to whom also Abraham presented a tenth part of all--being first, as his name signifies, King of righteousness, and secondly King of Salem, that is, King of peace: with no father or mother, and no record of ancestry: having neither beginning of days nor end of life, but made a type of the Son of God--this man Melchizedek remains a priest for ever.read more.
Now think how great this priest-king must have been to whom Abraham the patriarch gave a tenth part of the best of the spoil. And those of the descendants of Levi who receive the priesthood are authorized by the Law to take tithes from the people, that is, from their brethren, though these have sprung from Abraham. But, in this instance, one who does not trace his origin from them takes tithes from Abraham, and pronounces a blessing on him to whom the promises belong. And beyond all dispute it is always the inferior who is blessed by the superior. Moreover here frail mortal men receive tithes: there one receives them about whom there is evidence that he is alive. And Levi too--if I may so speak--pays tithes through Abraham: for Levi was yet in the loins of his forefather when Melchizedek met Abraham.

"Alas for you, Scribes and Pharisees, hypocrites, for you pay the tithe on mint, dill, and cumin, while you have neglected the weightier requirements of the Law--just judgement, mercy, and faithful dealing. These things you ought to have done, and yet you ought not to have left the others undone.