If each lower number, or denominator, is the same, you can order them like whole numbers, for instance 1/5, 3/5, and 8/5. Otherwise, you can alter your list of fractions to use the same denominator, without changing the size of any fraction.
Well, it is 9 months, but the average month is 4.3 weeks long, not 4. - (52 weeks / 12 months = 4.333 weeks per month.) - 4.333 weeks x 9 months = 38.99 weeks. So 9 months is just about the average of the 38 and 40 week numbers. To sum up, doctors talk about pregnancy on a 40 week timeline, the actual gestational time is about 38 weeks. All the being said, there are some variances in baby due date accuracy. Posted by Bill, almost a dad
Pregnancy lasts an average of 280 days or 40 weeks (almost 10 months) from the first day of your last menstrual period (LMP). The first day of your last menstrual period is considered day one of pregnancy, even though you probably didn't conceive until about two weeks later.