which rectangle is "fatter"a 3 by 5 rectangle or a 8 by 14 rectangle
If 3 and 8 were the bases then 3/5 = 0.6 and 8/14 = about 0.57. The fatness, the ratio of the width to the height, would be higher for the 3 by 5 rectangle.
If 3 and 8 were the heights, then it would be the other way around- the 8 by 14 rectangle would be fatter.