It is: 20/24*60 = 1/72 of a day
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1 day = 24 hrs, and 1 hr=60 min. Therefore 1 day=1440 min. Therefore 1 day + 4 hrs + 7 min equals 1440 min + 240 min+ 7 min or 1687 minutes. Applying the same principal to the other side of the equation gets us 360 min + 20 min or 380 min. 1687 minutes - 380 minutes = 1307 minutes. This equals 21 hrs 47 min.
1 hour = 60 mins → 20 min = 20/60 hr = ⅓ hr 1 day = 24 hours 6 hr 20 min = 6⅓ hrs → 6 hr 20 min = 6⅓ hrs ÷ 24 hrs/day = 19/3 × 1/24 days = 19/72 days ≈ 0.264 days
1h = 60 min so 1h and 20 min = 60 + 20 = 80 min
You have to know that 1 day = 24 hours and 1 hour = 60 minutes. The tricky part is converting hours:minutes into decimal hours. 15 minutes = 15/60 = 1/4 = 0.25 hours Therefore 7 hrs 15 min = 7.25 hours What fraction of a day? 7.25 / 24 = .30208333... = 30.2 percent
10:05 --> 10 * 60 min + 5 min = 605 min 08:20 --> 8 * 60 min + 20 min = 500 min 605 min - 500 min = 105 min (= 1 3/4 hr)