To simplify the expression x675/x453, we can divide both the numerator (x675) and the denominator (x453) by their greatest common factor.
The prime factorization of 675 is 3 x 3 x 3 x 5 x 5, and the prime factorization of 453 is 3 x 151.
The greatest common factor between 675 and 453 is 3.
Dividing both numerator and denominator by 3, we get (x x 3 x 3 x 3 x 5 x 5)/(x x 3 x 151).
Simplifying further, canceling out the common factors, we're left with (3 x 3 x 5 x 5)/(3 x 151).
This reduces to (9 x 5 x 5)/(151).
Therefore, the simplified expression is (225x)/(151).