If it's a serious question, six; if it's a trick then just the one that comes after the 4.
5.203125 eights
There seven eights in 56.
fortyeight
Nine.
35/8
It is: achtundvierzig (eight and forty).
1/4
0.048
There are 6 eights in 3/4.
Seven is the number of eights you are seeking.
3/4 eights
1.75 eights is equal to 14.