* Definition of "college": Are we talking about a four-year university, a two-year community college, or any post-secondary education?
* Socioeconomic factors: Children from higher socioeconomic backgrounds are far more likely to attend college regardless of parental education, but the likelihood increases further if a parent attended.
* Race and ethnicity: There are disparities in college attendance rates based on race and ethnicity, and these disparities interact with parental education levels.
* Country: College attendance rates and the influence of parental education vary widely across countries.
Studies show a strong correlation between parental college attendance and a child's college attendance. However, the exact percentage is not consistently reported across studies due to the variations listed above. You'll find ranges, rather than a single number. You would need to specify the factors mentioned above to get a more precise answer from specific research studies.