Simple....
you have ->> [tex]2 \frac{1}{8} [/tex]
Convert to an improper fraction....
1.)Multiply the whole number by the denominator..
2*8=16
2.)Add the number and the numerator..
16+1=17
3.)Use the original denominator...
[tex] \frac{17}{8} [/tex]
Now divide...
2.125
Thus, your answer.