(1) A Company hosts two large User's group Meetings for its customers every year. 420 customers are registered for the first meeting and 580 are registered for the second meeting. If 30 customers decide to switch their registration from the first meeting to the second meeting, what % of total attendees will be at 2nd meeting?

(2) If 18 cans of food are needed for 7 campers for 4 days, the number of cans needed for 6 campers for 7 days is ?