Can you tell me that you want 5% nanoclay concentration with respect to acetone or with respect to fibre weight. 

with respect to acetone

you can calculate using this simple equation

(% to be prepared * amount of solvent in ml or L) / 100

For eg to calculate 5 % in 5ml of acetone

(5% * 5ml)/100=0.1g

so you need to take 0.1g of nanoclay and mix it in 5ml of acetone to get 5% nanoclay in acetone.

good Luck

Thank you so much Dr. Is any different formula in relation to fibers?

if you want to prepare with respect to fiber weight then use this calculation

(fiber weight * percentage to need to prepare) / 100

For eg to calculate 5 % with respect to 10 gram of fiber weight

(10 * 5)/100=0.5g

so u need to take 0.5g of nanoclay and mix it with 10g of fiber.

Thank you so much Dr