A 150mg/dl glucose solution was diluted 1:2. Then 0.5ml of it was added to 4.5ml saline. 2ml of this solution was diluted to 10ml. What is the final concentration of glucose?

1L = 10dL
1dL = 100mL
My own calculation
150mg/dL = 150mg/100ml =1.5

150mg/100ml x 1/2 x 1/10 x 1/5
1.5x 0.5 x 0.1 x 0.2 = 0.015mg/ml I am not sure the answer

That looks ok to me.