Someone has 5 cookies and wants to divide it by 4 people. If you would like to know how many cookies will each person get, you can calculate this using the following step:
F = 15% v = 5% 0.15f + 0.05v = 0.14*10 15f + 5v = 140 3f + v = 28 f + v = 10 (total volume) ---------- Subtract 2f = 18 f = 9 liters of 15% v = 1 liter of 5%
