The overall literacy rate for those aged 10 and over was 95.7% but amongst those living in the estate sector it was only 86.1%. Of the 18,615,577 aged 5 or over, 499,563 (2.7%) had received a higher education qualification, 2,293,841 (12.3%) had passed GCE Advanced Level in Sri Lanka, 3,159,402 (17.0%) had passed GCE Ordinary Level in Sri Lanka and 700,419 (3.8%) had no formal schooling. The remaining 11,962,352 (64.3%) had left school with no qualifications or were currently at school.. How many less people had passed GCE Advanced Level in Sri Lanka than those who had passed GCE Ordinary Level?