Why numbers cannot subtract correctly?

I put together a spreadsheet earlier with a very simple formula and I got a very unexpected result. I tried the same calculation in many ways on several computers and short to force the precision (in the formatting of the cell resulting as currency or by setting turn instead of hundredths), I have the unexpected answer. The formula is simply '= 5.52 to 5.49' which for some reason in the response results "0.0299999999999994". "» Initially I was referencing more than one cell, but I boiled in as simple an equation as possible for discussion. Please do not hesitate to try and let me know if your results vary.

Hi TheTubbyOne,

Welcome to the communities of Apple Support!

Welcome also to the way computers operate floating arithmetic. This isn't a bug in numbers, just a fact of life. This is how computers convert 'human' (decimal characters) to binary and back to decimal.

A screenshot of a decimal subtraction and subtraction of integers:

Use the ROUND in the final formula function (don't keep 'rounding' at each stage). Let the numbers to deal with arithmetic in the Middle rounds.

Compare that to the subtraction of whole number in row 3.

Tested in numbers 3 and with a pencil and paper.

Kind regards

Ian.

Tags: iWork

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