Hi @Alexsantiago
Try these below approaches to solve this issue
1st method:
Check whether you have enabled the highlighted option

2nd method: since the date is appearing like that, it is actually represent the how many days your given date is from date 31st Dec 1899 (used in excel), so you can do a calculation to find the date by adding that number of days to 1899-12-31 like below

For percentage you can try same using multiplication on that value and then adding % to it using below method

Hope any of above method works for you
Mark it as solution if it resolves your query 🙂