Three days is 3/7 weeks, or about 0.42857 weeks.
52 days = 7 weeks and 3 days.
3 weeks is equal to 21 days.
One Week = 7 days 17 days = 2.43 weeks (2 weeks and 3 days)
3 days is 3/7 of a week.
80 days is 11 3/7 weeks.
There are: (3*7)+2 = 23 days
3 weeks 6 days
There are 7 days in one week. Therefore, 570 days is equal to 570/7 = 81 remainder 3 or 81 weeks 3 days.
One week is 7 days, so 21 weeks is 147 days.
3 x 7 (days per week) = 21 days
There are 7 days in a week. Therefore, 21 weeks is equal to 21 x 7 = 147 days.