Strange Request of Rounding Down against Laws of Mathematics

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Jack Parry
Jack Parry ✭✭✭✭
edited 09/07/23 in Formulas and Functions

I've had a strange request. One that defines the laws of Mathematics:

I'm calculating the time difference and then using this formula to round down. However, the formula is following the laws of mathematics and rounding up when it sees an 8 or 9. 

=MROUND(ROUNDDOWN(Difference@row), 5)

 E.g.

In this example, the requestor needs to round down to 55 always.


Any suggestions?

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Best Answer

  • MichaelTCA
    MichaelTCA ✭✭✭✭✭✭
    Answer ✓
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    Hello @Jack Parry

    =IF([Difference]@row < MROUND([Difference]@row, 5), MROUND(([Difference]@row - 5), 5), MROUND([Difference]@row, 5))

    This equation first specifies whether the value was rounded up or down, based on the multiplier. If it was greater, than subtract 5 (being the multiplier) and round that value to the nearest multiple.

    This function will ALWAYS round down unless the value is already a multiple of 5.

    If the value in the cell is 54, the result will be 50. Not 55.

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