Answer:
aptitude is something you can do well or have an ability to do well and interest is having a preference for a certain thing.
Step-by-step explanation:
Aptitude is a combination of characteristics that indicate if you have the skills or are able to acquire the skills needed to do something. Interest is a having a interest in a skill or subject regardless of skill set.
Aptitude: Can you do it?
Interest: Do you want to do it?