It just means that whoever gets the most votes wins, I.e the biggest single number, its literally the simplest voting system devised. Basically if you had three candidates and 10 voters, then candidate 2 could win with four votes, if the other two both got three. You can see the central complaint here, more votes were cast against the winner than for, but no one candidate was chosen more than the other. So yes, in an FPTP election a candidate can indeed win on eight percent, because its a pure numbers game.