Can butenafine be used for treating ringworm on chest? Is ringworm on chest same fungus as jock itch, whats the difference in kind of fungi?

Most likely. The antifungal that you have is effective for fungal skin disease Tx. In the groin area you may have yeast or fungus or a mixed infection and the Butenafine may or may not be effective but should do no harm for limited use (2-4 weeks)