10 years
120 months
521 weeks
3,652 days
87,658 hours
5,259,492 minutes
315,569,520 seconds
One decade is ten years.
Decade =10 years
do you mean "decade"? if so then there's 10 years in a decade.
0.3
Neither one makes sense, but "How many days are you?" is grammatically correct.
One quarter
Seven days in one week
11,574 days
11,574 days
11,574 days
90 days.
365 days