In a data analysis problem, a company surveyed its employees to determine their preferred modes of transportation to work. The survey results showed the following distribution of responses:

• 40% prefer to drive alone
• 25% prefer to carpool
• 15% prefer public transportation
• 10% prefer cycling
• 10% prefer walking

Based on this data, if the company has 200 employees, how many employees prefer public transportation? Additionally, if the company wants to encourage cycling, what percentage of employees would need to switch from driving alone to cycling for cycling to become the most preferred mode of transportation?