A network administrator needs to calculate the percentage of uptime for a critical switch that experienced two outages last month. The first outage lasted 2 hours and the second outage lasted 3 hours. Given that the switch must be operational 24/7, which of the following is the BEST calculation to determine the percentage of uptime for the month?
(30 days - (2 hours + 3 hours)) / (30 days * 24 hours/day) * 100
((2 hours + 3 hours) / (30 days * 24 hours/day)) * 100
((30 days * 24 hours/day) - (2 hours + 3 hours)) / (30 days * 24 hours/day) * 100
((30 days * 24 hours/day) - (2 hours + 3 hours)) / (7 days * 24 hours/day) * 100