A quick read revealed that it wasn’t. The correct failure rate was 10.2 percent, but the error made by the journalist, and presumably approved by the editor, was perhaps more revealing about the true position of mathematics nationally. They reasoned that since 4.5 percent of students had failed the higher level paper, 5.7 percent had failed the foundation level and 12.3 percent had failed the ordinary level paper, it must follow that 4.5 + 5.7 + 12.3 = 22.5 percent of students had failed mathematics. The enormity of such an error and its ability to reach the front page illustrates clearly that many of us are functionally innumerate.
The article further gives a nice insight into the situation for mathematics education in Ireland, and although it is more of a news article than a scientific paper, it might be worth reading.