'Two thirds' in the Bible

"'Alongside the portion set apart as the holy allotment, you will allot for the city an area one and two-thirds miles wide and eight and a quarter miles long; it will be for the whole house of Israel.

"The remainder, one and two-thirds miles in width and eight and a quarter miles in length, will be for common use by the city, for houses and for open space. The city will be in the middle of it;