Hi! I am here to answer your question!
First convert the mixed fraction into an improper fraction.( If you don't know how to turn a mixed into an improper fraction, see the end of this answer)
So in your case: 1 6/8
= 14/8
Now simply divide 14 by eight:
So : = 14/8 = 7/4 = 1.75
Turning a mixed fraction into an improper fraction:
First multiply the denominator of the fraction by the whole number. After doing that, add the answer with the numerator.
For example : 4 6/7
= (4*7) + 6
= 28 + 6
= 34
Now keep the denominator the same as in the mixed fraction.
= 34/7
I hope that answers your question! If you have any more queries post it on this website!