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15 / 2 = 7.5
15' can mean a length of 15 feet;15' can also mean a length of time of 15 minutes;15' can also mean an angle of 15 minutes (1 minute is 1/60 degree → 15' = 15/60 = 1/4 = 0.25°).It all depends upon the context to give the probable unit for the ' mark.
If you mean a minute then it is 4/60 which is 1/15 simplified
To find the fraction of a minute in 15 seconds, we first need to determine how many seconds are in a minute, which is 60 seconds. Therefore, the fraction of a minute in 15 seconds is 15/60, which simplifies to 1/4. This means that 15 seconds is equivalent to one-fourth of a minute.
15 * * * * * 2 of them