How much fluid is in the tank if it has 6' 8" in it?

Question

If an oil tank holds 1000 bbls of fluid and there is 62 bbls per foot

Answer 1

62*6.6666 = 413.3292

Answer 2

If your teacher is a stickler for proper use of significant figures, you might want to drop anything right of the decimal point, and use 410, or _maybe_ 413bbls, if you insist on more digits than in the input data, 413+1/3 or 413.3333333.....

6 + 8/12 = 6+2/3

6+2/3 * 62 = 413+1/3