3 tbsp. of extract are mixed with 250 ml. of oral suspension base. What is the final concentration of the suspension?

Question

I request the proper formula to figure out how to work this problem. Thank you.

Answer 1

3 tbsp =3*15 ml = 45 ml.
250 ml base
Total volume = 250+45 ml = 295 ml.
Concentration
=45 ml / 295 ml
= 15% approx.

(note: 1 tsp=5ml, 1 tbsp=15ml)