[Aardwolf]

> 1 + 10% is 0.11.

I know adding % has multiple conventions, but this one seems odd, I'd interpret 1 + 10% as "one plus 10 percent of one" which is 1.1, or as 1 + 10 / 100 which happens to be also 1.1 here

The only interpretation that'd make it 0.11 is if it represents 1% + 10%, but then the question of 10% + 10% is answered: 0.2 or 20%. Or maybe there's a typo and it was supposed to say "0.1 + 10%"

[BoiledCabbage]

1 + 10% could parse like the following:

(1+10)%

Which is 11% or 0.11