funny lil' #'s

[cheeseboy]

Whiles reading thru zubrick's cheese stubled upon a density that consisted of a number with a tiny ratio( or two numbers seoerated by a slash) beside it like 7.224 20/4, with the "20/4" being tiny in size to the right of the 7.224. What are there lil' numbers for?
May The Source Bee With You....Always.

[PrimoPyro]

What edition and what page?

If its not the fifth edition, tell me what chapter.
Vivent Longtemps la Ruche!

[Rhodium]

It is the density ratio of the liquid at 20°C, compared to the density of water at 4°C (at which temp water is the densest).

[Osmium]

In other words, g/cm³.
Dunno how many ounces per cubic inch that translates to