In the Slovak Republic, Italy, the Russian Federation and Poland, less than 20% of low-skilled adults reported participation in any form of adult education. The gap in participation rates between adults with low and high literacy proficiency is on average 44 percentage points (30% compared to 74% respectively). In the case of formal education, this difference is 12 percentage points (6% compared to 18%). In relative terms, however, the difference in rates is even greater in the case of formal education, where highly proficient adults are three times more likely to participate than adults with low proficiency.