첫번째

The report showed Korean youngsters have improved in reading skills, outperforming even Finland,the overall winner.

여기서 이해가 안가는 것은 outperforming even Finland 저부분이 이해가안갑니다 이문장을 해석해주시고 문법적으로 쉽게 설명해주세요~

두번째

Considering error margins, their ranking in mathematics ranged between first and fourth, while their science ability ranged between seventh and 13th, according to the survey.

여기서는 Considering error margins 저부분이 이해가 안가네요~ 이것도 첫번째것과 같이 설명부탁드립니다~