How do you convert a percentage to international units?

The mass unit in SI is the kilogram; 1 kg = 1 000 g.

I know that Synthase Units are used to qualify enzymatic ability to synthesis molecules its indicated for. I don't know that a conversion factor is available to this. However, some supplements use...

you make a chart and on top for example you have 2 gallons then at the bottom you would put gallons. and say you want to convert to quarts you put over the 1 gallon 4 quarts and it's simple cross...

No

Multiply by 1.00 . The same factor also produces greater units.