To find out how much dark chocolate Amy bought, we need to subtract the amount of milk chocolate from the total amount of chocolate she bought.
Total chocolate = 65.753 ounces
Milk chocolate = 27.51 ounces
Now, subtract the milk chocolate from the total chocolate:
\[ \text{Dark chocolate} = \text{Total chocolate} - \text{Milk chocolate} \] \[ \text{Dark chocolate} = 65.753 , \text{ounces} - 27.51 , \text{ounces} \] \[ \text{Dark chocolate} = 38.243 , \text{ounces} \]
So, Amy bought 38.243 ounces of dark chocolate.