While there are exactly 86,400 atomic-clock based seconds in a 24-hour day, the actual time for the earth to complete one rotation is slightly longer than 86,400 seconds. So every now and then, a ...

Conversion From Minutes & Seconds to a Decimal in Excel. ... For example 0:30:15 – which is zero hours, 30 minutes and 15 seconds – will become 0.0210069444444444, ...

To work this out, you change Maya’s time into seconds. Then you can compare it with Sally's time. Maya's time is 2 minutes 58 seconds. Remember, 1 minute is 60 seconds, so 2 minutes is 120 seconds.