Which is greater or eqaul 800 m or 799,999 mm

800m is greater than 799,999mm. Because 799,999mm equals 799m.

Well because 1 meter is equal to 1,000 millimeters then 800 m is equal to 800,000 mm. This means that 800 m is exactly one millimeter more than 799,999 mm. Simply put, 800 meters are more than 799,999 millimeters.