Write a compound number that expresses a measurement with figures. For example, write, "The man is 6 feet 2 inches," or "The ditch is 9 yards 2 feet long."
Express a weight with a compound number. For example, write, "The new baby weighs 7 lbs. 2 oz." or "He lost 16 lbs. 1 oz. in one month." Use figures when expressing units of weight.
Write a length of time with a compound number. For example, write, "The sun sets in 1 hour 15 minutes," or "The flight leaves in 4 hours 3 minutes."
Write a compound number over 20 in figures unless you begin a sentence with the number, in which case you must use words and hyphenate them. For example, write, "Thirty-three students were absent with the flu," or "Ninety-seven tulips bloomed in the castle landscape."