Need help with this one

Do not comment if you aren’t going to . create a real-life situation and create a system and show how it might be modeled algebraically with a system of equations (or inequalities) show all work include a few sentences explaining the situation, your variables of choice and what each represents, and how you would set it up and solve it algebraically. !

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

I’m really confused and need your assist me with this question i’ve never been taught