Most numbers used in business are based on 10 – commonly known as the decimal system. One dollar is $1.00 and a half-dollar is $0.50. Time, of course, is an exception because it's based on 12. The day ...

Many Microsoft Excel sheets store date and time values. Sometimes the two values appear in the same cell, and sometimes they do not. If you work with dates and/or times, you need a good understanding ...