[01HNNWZ0MV43FF]

Lua is telling me 0.1 + 0.1 == 0.2, but 0.1 + 0.2 != 0.3. That's 64-bit precision. The issue is not with precision, but with 1/10th being a repeating decimal in binary.

[anthk]

Not an issue on Scheme and Common Lisp and even Forth operating directly with rationals with custom words.