How to do improper fractions with 3.8 repeating

3.88888=3.88888/1=38.8888888

so lets ssay our repeating decimal = a fraction x

x=3.888 is true

multiply by 10

10x=38.8888

now subtract fir frist eqation from second

10x-x=38.8888-3.888888

9x=35

divide both sides by 9

x=35/9

x=3 and 7/9

anser is 3.88=3 and 7/9