Joan started work 2 years ago. Her starting salary was 1/2 of Mike's salary at that time. Each year since then Joan has received a raise of 5% in her salary and Mike has received a raise of 10% in his salary. What percentage (to the nearest percent) of Mike's current salary is Joan's current salary?
?1. 45
?2. 46
?3. 48
?4. 50