3 x 7 (days per week) = 21 days
Three days is 3/7 weeks, or about 0.42857 weeks.
14 weeks, 3 days
21 days is 3 weeks.
There are 21 days in 3 weeks.
17 weeks and 3 days.
There are 3 weeks in 21 days
One Week = 7 days 17 days = 2.43 weeks (2 weeks and 3 days)
3 weeks and 4 days.
4 weeks (28 days) and 3 more days
3 weeks
26 days = 3.7 weeks.
25 days.