I find the easiest solution is to make all the fractions in your set have a common denominator. For example, if you must order 2/4, 1/8, and 3/16 from least to greatest (or vice versa), choose the smallest number that all of the fractions' denominators go into.
Quick Answer. According to the United States Postal Service, priority mail takes 1 to 3 days to arrive at its destination. The length of time varies due to the distance based on the shipping point and the receiving point. Continue Reading.
While the USPS does give estimated delivery times for Global Express Guaranteed (1-3 days), Express Mail International (5 days), and Priority Mail International (6-10 days), for First-Class Mail International the USPS website says only Varies.