Alrighty, so to order the quantities from least to greatest as asked for in the question, first we should convert all the values given to a specific way of writing (this being either decimal, fraction or mixed number). Since all but one is given in decimal form, we can convert the other mixed number to be the same.
An easy way to do this is by separating the mixed number from its corresponding fraction.
[tex] 3\frac{3}{8} [/tex] becomes [tex]3+ \frac{3}{8} [/tex]
3+(3÷8)
You can long divide 3 and 8 to get 0.375
3+0.375 = 3.375
Now that all of the values are written in the same manner, order them from least to greatest.
3.75, 3.375, 2.625, 3.5
2.626, 3.375, 3.5, 3.75
~I hope this helps!~