Making it harder than necessary
Susan,
Why did you insert an extra column (F) and these two steps
1.Enter the specific interval, in minutes, in F2. In this case, enter 15 to represent the quarter-hour interval.
2.In G2, enter the following formula
=TIME(HOUR(E2),MROUND(MINUTE(E2),$F$2),0)
When you could have simply put the value 15 into the formula like this?
=TIME(HOUR(E2),MROUND(MINUTE(E2),15),0)