One way to measure educational attainment is by looking at the percentage of the population with a college degree. According to the Organisation for Economic Co-operation and Development (OECD), the UK has a higher percentage of college graduates than the US. In 2019, 45% of UK adults aged 25-64 had a college degree, compared to 39% of US adults.
However, another way to measure educational attainment is by looking at the average number of years of schooling completed. According to the same OECD data, the US has a higher average number of years of schooling completed than the UK. In 2019, the average number of years of schooling completed by US adults aged 25-64 was 13.7 years, compared to 12.8 years for UK adults.
It is important to note that these are just two measures of educational attainment, and there are other factors that could be considered. For example, the quality of education can vary significantly between different countries and even within different regions of the same country. Additionally, educational attainment is not the only factor that contributes to a person's overall level of knowledge and skills.
In conclusion, it is difficult to say definitively whether the UK or the US is more educated. There are a number of different ways to measure educational attainment, and each measure has its own strengths and weaknesses. Ultimately, the best way to assess the educational attainment of a particular population is to consider a range of factors, including the percentage of the population with a college degree, the average number of years of schooling completed, and the quality of education.