First sketch - complete two parts

>>> # of users who make a purchase in their first 90 days after sign up (excluding their sign up day): 6367
>>> # of users who sign up: 24049
>>> 1) What percentage of users make a purchase in their first 90 days after sign up (excluding their sign up day)?: 0.26475113310324755
>>> # of users who purchased in the first 90 days received a message after their sign up date but before their first purchase date: 2651
>>> 2) What percentage of users who purchased in the first 90 days received a message after their sign up date but before their first purchase date?: 0.11023327373279554