There are 3 weeks in 21 days
Three weeks is twenty-one days.
142 weeks and 6 days.
It is 9 weeks and one day.
17 weeks and one day.
twenty-one
One week is 7 days, so 21 weeks is 147 days.
504 hour in 21 days
There are 26 weeks and one day.
7
90 days are 12 weeks and 6 days, or one day less than 13 weeks.
76 days is one day less than 11 weeks.