On average, an almost 40-point difference in literacy proficiency separates adults of highly educated parents from those whose parents have the lowest levels of education. On average, the likelihood of being a low performer is about 25 percentage points lower for adults with at least one tertiary-educated parent, compared with adults whose parents have an upper secondary education. Adults whose literacy is rated at Level 1 and below predominantly have poorly educated parents. On average, more than half of adults (52.2%) below the baseline in literacy proficiency had parents who had not completed an upper-secondary education.