[tex]6\frac{1}{8}=6.125\\ \\ \sqrt{4} =2[/tex]
A number in between these 2 and 6.125 can be 3, 4, or 5 when looking at just integers. Decimals such as 2.5, 3.5, 4.5, and 5.5 are also in between those two given numbers. Fractions that are in between these two numbers are [tex]\frac{9}{4} , \frac{10}{4} , \frac{11}{4}...\frac{23}{4}[/tex].
Hope that helps!