plzzz answer this.

C acquired 30000ordinary shares and $10000 of 4% loan stock in Excel company.
Excel co. is financed as follows:
$1 ordinary shares $50000
4% loan stock $40000
Retained earnings $10000

For purpose of preparation of consolidated financial statement, what is C's interest in Excel co.?
Is it:
85% or
30% or
50% or
60%.