HELP PLEASE. Angles and chords

How do you write 0.5% as a fraction

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?

Me find the answer and explain the process to find the answer of the problem appreciate it : )