To simplify the expression \(\frac{x^{675}}{x^{453}}\), we can use the property of exponents that states \(\frac{x^a}{x^b} = x^{a-b}\).
Using this property:
\[ \frac{x^{675}}{x^{453}} = x^{675 - 453} \]
Now, we subtract the exponents:
\[ 675 - 453 = 222 \]
Therefore, we have:
\[ \frac{x^{675}}{x^{453}} = x^{222} \]
The simplified expression is:
\[ x^{222} \]