We know the smallest number has to be \(\frac{3}{8}\). Why? Well, one way to see it is that \(\frac{1}{8} = .125\) in decimal form, so \(\frac{3}{8} = .375\). But another way to see it, even it you don't remember the decimal form of \(\frac{1}{8}\), is to notice that \(\frac{3}{8}\) is less than \(\frac{4}{8} = \frac{1}{2}\), and both of the other numbers are bigger than \(\frac{1}{2} = .5\)!
Now, to order the other two numbers, you should remember that \(\frac{1}{5} = .2\), so \(\frac{3}{5} = .6\), which is less than \(.625\).
So, the order of the numbers from greatest to least is
\(\bf .625, \frac{3}{5}, \frac{3}{8}\)
