It's no secret I hate math.
If something is 40% ingredient A, 38% ingredient B, and 9% ingredient C, I need to figure out a "parts" method.
For example, can I use 4 grams A, 3.8 grams B, and .9 grams C? I know it doesn't add up to 100%, and I'm hoping the extra 10% is just inert ingredients or filler of some sort. Although I will maintain my distance when trying it for the first time.