The MOD function in Microsoft Excel lets you work out whether one number is divisible by another. If it's not, it tells you what's left over. For example, if you divide 3 by 2, the MOD function ...

Extracting Decimal Parts: MOD can isolate the decimal portion of a number. For example, `MOD (5.45, 1)` returns 0.45, while the INT function extracts the whole number (5).