To convert 4 7/8 into a decimal, we first need to turn the mixed number into an improper fraction.
In order to turn the mixed number into an improper fraction, we need to multiply the whole number by the denominator and add it up with the numerator.


Now, put that sum over the denominator:
(improper)
Now, to turn the improper fraction into a decimal, we need to divide the numerator by the denominator:

(final answer)