I need to increase the concentration of my solution by adding another solution of a different concentration

Hi, I’m not a chemist, and I need help please.

I have 39ml of a solution that has 0.025% concentration of Finasteride. I have a separate 20ml solution of 0.2% concentration Finasteride. How much of solution 2 should I add to solution 1 in order to create a new solution that has a concentration of 0.05%?

Thank you :)