7.80 = 7.8 = 7 + 8/10 = 7 + 8÷2/10÷2 = 7 + 4/5 = 7 4/5
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To convert seconds to minutes, you divide the number of seconds by 60, since there are 60 seconds in a minute. Therefore, 780 seconds is equal to 780 ÷ 60, which equals 13 minutes.
1 and 1/4
9 1/8
780, 1560, 2340 and so on.
It is: 2 and 17/25 in its simplest terms