Yes, and the Bitcoin network ITSELF can be attacked with a faction of the total hashpower on the Bitcoin network. Specifically, the fraction is 51/100, or 51 p

Yes, and the Bitcoin network ITSELF can be attacked with a faction of the total hashpower on the Bitcoin network. Specifically, the fraction is 51/100, or 51 percent of the network. This is for the main Bitcoin network. The fraction for Bitcoin cash would be around 15%, or 15/100, expressed as a fraction. The Bitcoin cash network would require a smaller fraction, yes. But this still isn't a huge concern. If it is 3 times easier to attack bitcoin cash, that is still extremely difficult. Fractional hashpower attacks, (51% attacks) are all explained quite clearly in the white paper.