Kamal has scored an average of 80 marks in 5 subjects. After rechecking it is found that his marks in History and Geography were wrongly entered as 85 and 90 respectively, instead of 75 and 80 respectively. Find the percentage change of Kamal's average score.
1
5% decrease
2
5% increase
3
5.26% increase
4
5.26% decrease
5
None of these