  We demonstrate that the parafermions appear in the $r$-th root of unity limit
of $q$-Virasoro/$W_n$ algebra. The proper value of the central charge of the
coset model $ \frac{\widehat{\mathfrak{sl}}(n)_r \oplus
\widehat{\mathfrak{sl}}(n)_{m-n}}{\widehat{\mathfrak{sl}}(n)_{m-n+r}}$ is given
from the parafermion construction of the block in the limit.
