# Subtract minutes from a time

You can subtract (or add) a number of minutes from a time using fractions.
Dates are represented as sequential whole numbers so 1 hour is equivalent to the fraction (1/24).
Times are represented as fractions based on there being 24 hours in a day.
1 Hour is 1/24 = 0.04166
1 Minute is 1/(24*60) = 1/1440
1 Second is 1/(24*60*60) = 1/86400

Cell "A1" displays the current date. Custom format "dddd dd mmmm yyyy".
Cell "A2" displays the current date and time. Custom format "dddd dd mmmm yyyy hh:mm:ss".
Cell "A3" displays the current time minus 25 minutes
Cell "A4" displays the current time minus 25 minutes seconds using the TIME function to return the correct decimal.
Cell "A5" displays the current time minus 4 hours and 75 minutes.
Cell "A6" displays the current time minus 4 hours and 75 minutes using the TIME function to return the correct decimal.
Cell "A7" displays the current time minus 6 hours, 30 minutes and 80 seconds.
Cell "A8" displays the current time minus 6 hours, 30 minutes and 80 seconds using the TIME function to return the correct decimal.
All these cells have been formatted with the custom number format "dddd, dd mmmm, yyyy hh:mm AM/PM".

 A 1 =TODAY() = Sunday 01 May 2022 2 =NOW() = Sunday 01 May 2022 18:37:54 3 =A2-(25*(1/1440)) = Sunday, 01 May, 2022 06:12 PM 4 =A2-TIME(0,25,0) = Sunday, 01 May, 2022 06:12 PM 5 =A2-(4/24)-(75/1440) = Sunday, 01 May, 2022 01:22 PM 6 =A2-TIME(4,75,0) = Sunday, 01 May, 2022 01:22 PM 7 =A2-(6/24)-(30/1440)-(80/86400) = Sunday, 01 May, 2022 12:06 PM 8 =A2-TIME(6,30,80) = Sunday, 01 May, 2022 12:06 PM

### Built-in Functions

NOW - The serial number of the current system date and time.
TIME - The time as a decimal given an hour, minute, second.
TODAY - The serial number representing today's date.