Each tablet has a dosage of 1.25mg
You'll give the patient 5 and a half tablets, to calculate the total dosage of medicine you'll give the patient you can apply cross multiplication:
1tablet_____1.25mg drug
5.5tablets__xmg
[tex]x=\frac{5.5\cdot1.25}{1}=\frac{55}{8}=6.875[/tex]The total dosage is 6.875mg