  In this paper, we study the entanglement transformation rate between
multipartite states under stochastic local operations and classical
communication (SLOCC). Firstly, we show that the entanglement transformation
rate from $\ket{GHZ}=\tfrac{1}{\sqrt{2}}(\ket{000}+\ket{111})$ to
$\ket{W}=\tfrac{1}{\sqrt{3}}(\ket{100}+\ket{010}+\ket{001})$ is 1, that is, one
can obtain 1 copy of $W$-state, from 1 copy of $GHZ$-state by SLOCC,
asymptotically. We then generalize this result to a lower bound on the rate
that from $N$-partite $GHZ$-state to Dicke states. For some special cases, the
optimality of this bound is proved. We then discuss the tensor rank of matrix
permanent by evaluating the the tensor rank of Dicke state.
