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There are 12.5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60.1 2 3 4 5 6 7 8 9 10 11 12.
To convert a decimal from hours to minutes multiply by 60 so 0.1 x 60 = 6 minutes.
300 minutes are in 5 hours 300 minutes
300 minutes 5 hours x 60 minutes per hour = 300 minutes