There are exactly 86,400 standard seconds in a standard day, but in the French decimal time system there are 100,000 decimal seconds in the day, so the decimal second is shorter than its counterpart.
Decimal to Standard:
-One decimal second is 86,400/100,000 = 0.864 standard seconds.
-One decimal minute is 1,440/1,000 = 1.44 standard minutes, or 1 standard minute and 26.4 standard seconds.
-One decimal hour is 24/10 = 2.4 standard hours, or 2 standard hours and 24 standard minutes.
Standard to Decimal:
-One standard second = 1.15740 decimal seconds
-One standard minute = 69.44 decimal seconds (or .69 decimal minutes)
-One standard hour = 4,166.67 decimal seconds (or 41 decimal minutes and 67 decimal seconds)