For this, we have to divide 4.5 by 0.6
[tex] \frac{4.5}{0.6} [/tex]
let's first multiply both numbers by 10 (this removes the fraction:)
[tex] \frac{45}{6} [/tex]
divide by 3:
[tex] \frac{15}{2} [/tex]
and the result is 7.5
so the answer is 7 and a half glasses.