How to write the contrapositive from a conditional statement

The video tutorial explains the concept of conditional statements, specifically focusing on the contrapositive form. It begins with a discussion on the conditional 'P then Q' and transitions into explaining the contrapositive 'not Q then not P'. The teacher uses a practical example involving fishing to illustrate these logical concepts, where 'P' is 'I go fishing' and 'Q' is 'I catch fish'. The contrapositive is demonstrated as 'If I don't catch any fish, then I did not go fishing'.

What is the relationship between the original statement and its contrapositive?

How can you express 'I did not go fishing' in terms of the original conditional statement?