seconds
You would use seconds.
The units for the denominator is minutes. Also, since the number in the denominator is to be omitted, the number of seconds (in a minute) are totally irrelevant.
The units in the denominator are minutes. Also, since you are asked to omit the number in the answer, the fact that there are 60 seconds in a minute is irrelevant.
seconds
seconds.AriAesthetic
seconds per minute (secs.min^-1)(secs/min). 480 secs ------------------ = 8 mins 60 secs/min
You place the unit which you are converting from in the denominator.
The units in the denominator are pounds.
ounces
pounds
16
20