I want to know the answer to the following question:
What makes up 40-50% of the cell walls in wood?
All the background I'm provided with is that "It consists of cells, and the cell walls are composed of micro-fibrils of cellulose (40% – 50%) and hemicellulose (15% – 25%) impregnated with lignin (15% – 30%).". Is that enough to answer the question?