How to make Excel just keep 2 decimal place behind comma after executing function?

Hello, I recently downloaded Solver and Data Analysis tool pack and it changed the decimal place especially in percentage. Usually with excel, after for example executing =a%/b%, I will receive number with maximum 4-6 decimal place behind the comma. However recently, it starts giving me numbers up to 15 decimal place behind the comma. How to solve this for entire book without using trunc or something else? I just want to keep it to 2 decimal place behind the comma for the whole file but it always automatically gives more than 2 decimal behind place. I have checked option > advance, googled it but no avail. My excel is 2021 version, english, and I'm just beginner who is stressed about this. Thank you in advance.