last month's balance on your credit account was $2,350. You paid off $865. What percentage of your original balance is left?

63.19%

Explanation:

Credit account balance = $2,350

Amount paid = $865

Balance unpaid = $2,350 - $865

= $1,485

The percentage of your original balance left is given by the ratio of amount left to the original balance expressed as a percentage.

percentage of your original balance left = ($1,485 / $2,350) * 100%

= 63.19%