On 2008 Jan 26 , at 11:04 AM, Paul Trusten wrote:
Also, since percentages by weight or volume are defined
in metric units (g/100 mL or mL/100 mL),
Percentages must be found from a ratio of two similar quantities. You
can find the number of grams per milllilitre if you want to, but it's
not a percentage and can't be expressed as a percentage. It could be
called a concentration, perhaps.
One can express percentage by mass as "grams per gram" or percentage
by volume as "millilitres per millilitre"*, but not in the form of
grams per millilitre.
Regards,
Bill Hooper
Fernandina Beach, Florida, USA
*I think of this calculation as, first, finding the ratio of the two
things (in this case volume of alcohol divided by volume of beverage)
and then, separately, expressing the first result as a percent by
dividing by 100. Certainly it is OK to combine the steps into one as
Paul does in referring to "mL/100mL".
==========================
SImplification Begins With SI.
==========================
