Answer:
A medium milkshake will use
of a pint of milk.
Step-by-step explanation:
Given:
A large chocolate milkshake takes =
of a pint of milk
While a medium chocolate takes =
the amount of milk for a large milkshake.
To find the amount of milk required for a medium milkshakes.
Solution:
The amount of milk required for a medium milkshakes is given as:
⇒
of the amount of milk for a large milkshake.
Plugging in the amount of milk for a large milkshake.
⇒
of 
by
we mean multiplication.
⇒ 
⇒ 
Thus, a medium milkshake will use
of a pint of milk