I also agree your answer was right, and there must be something wrong with the way the system recorded data. Perhaps the entry that should be typed is, as Sosia suggested: "74,3*"
@Sosia: I think the "asterisco" after 74,3 is just a footnote reference, as it says afterwards "por ciento", so the symbol % wouldn't be needed, but maybe the one who entered the data to the system didn't see that.
