(c) if part only of the interest or a more limited right that was subject to a security interest or real security was expropriated, the value of the security interest or real security is that proportion of its value otherwise determined under this subsection as though the whole of the interest or a less limited right subject to the security interest or real security had been expropriated, that :
(c) if part only of the interest or a more limited right that was subject to a security interest or real security was expropriated, the value of the security interest or real security is that proportion of its value otherwise determined under this subsection as though the whole of the interest or a less limited right subject to the security interest or real security had been expropriated, that: .