To solve for the missing exponent in the equation \( \frac{h^{450}}{h^?} = h^{215} \), we can use the properties of exponents.
We can simplify the left side of the equation using the rule \( \frac{a^m}{a^n} = a^{m-n} \):
\[ \frac{h^{450}}{h^?} = h^{450 - ?} \]
Setting this equal to the right side, we have:
\[ h^{450 - ?} = h^{215} \]
Since the bases are the same, we can set the exponents equal to each other:
\[ 450 - ? = 215 \]
Now, we solve for \( ? \):
\[ ? = 450 - 215 \] \[ ? = 235 \]
Therefore, the missing exponent is \( 235 \).