Have you ever read an herbal book and think, what the hell are “parts?”
Well, I’ll explain them to you! Parts are a ratio or proportion.
To make a tea (or whatever), take each number of parts and multiply it by a unit.
For tea, you can multiply by a 1/4 (quarter) of a teaspoon.
5 parts of A, 2 parts B, 1 part C
5 x 1/4 = 1.25 quarter of a teaspoon
2 x 1/4 = 0.5 quarter of a teaspoon
1 x 1/4 = 0.25 quarter of a teaspoon