Is this library correct in terms of Base10 calculations? about fixedmath.net HOT 1 CLOSED

The precision of this type is 2^-32, which is approx 2,3283e-10. So it's not quite 10 decimals.
Basic arithmetic (+, -, *, /, %) is all correct within the precision of the type and well-tested.
Other operations have various degrees of accuracy which are usually noted in the description.
Note that the type performs saturation arithmetic which does not preserve mathematical properties once you run into its limits. (All numerical types eventually break down but saturation arithmetic can be tricky to deal with).

That said, I would not recommend using this as a faster replacement of System.Decimal (assuming it's faster...). This type is intended to replace System.Single or System.Double in applications where determinism is important or floating-point hardware is not available.

Note that since it's based on System.Int64, it will perform significantly faster in a 64-bit application where that type fits into registers.

from fixedmath.net.