'Fifth' in the Bible

There was evening and there was morning, a fifth day.

God gave heed to Leah, and she conceived and bore Jacob a fifth son.

Let Pharaoh take action to appoint overseers in charge of the land, and let him exact a fifth of the produce of the land of Egypt in the seven years of abundance.

At the harvest you shall give a fifth to Pharaoh, and four-fifths shall be your own for seed of the field and for your food and for those of your households and as food for your little ones.”

Joseph made it a statute concerning the land of Egypt valid to this day, that Pharaoh should have the fifth; only the land of the priests did not become Pharaoh’s.