You first have to convert the mixed fraction an improper fraction:
((4 x 9) +8)/9 = 44/9
You then need to divide the numerator by the denominator from the step before:
44/9 = 4.88
Now that we have a decimal we must round by 1 to the left side of the decimal point and make the right side 0
So, 4 8/9 would be 5