The integer -20 would BEST represent the event:
- You withdraw $20 from a bank account.
Withdrawing money reduces the total amount in the account, which is often represented by a negative value in accounting.
The other event that could be represented by a negative value, though not as strongly as the bank withdrawal, is removing weight (as in removing 20 pounds of peaches), but that typically doesn’t represent a negative in the same clear financial or mathematical sense.