90:27:00
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1:3
9:27 to 9:30 = 3 minutes9:30 to 11:00 = 90 minutes 11:00 to 11:15 = 15 minutes TOTAL minutes = 3 + 90 + 15 = 108 minutes
The ratio of 90 to 18 is written as 90/18
36 minutes/(11 min 36 sec) = 2160 sec/696 sec = 90/29 which cannot be simplified further.
90 minutes.