Style is checked using Grazie (Pro) along with
custom style guides
that are defined in .grazie.en.yaml.
In accordance to the SI standard a value and unit should be separated by a narrow no-break space (NNBSP),
in HTML/MD this would be done with  .
This only applies to SI units like 120 g and 10 %.
Cups or Tablespoons would have simple NBSP.
Since a line-break is unlikely, a standard white space is also acceptable then.
Minutes/seconds or inches etc. should be represented with the actual Prime1, i.e. ′ or ″ respectively: 45′ and 30″.
Fraction numbers must be represented by their unicode “vulgar fraction” counterparts2, e.g., ⅛, ¼, ½, ⅔, ¾, ⅒