Vanessa owed her friend $24. She paid back $8. How much more does Vanessa need to pay before her account is at zero?

Vanessa owed $24 and has already paid back $8, so subtract: $24 − $8 = $16. She still needs to pay $16 to bring the amount she owes to zero. The correct choice is $16.

AI-written and checked against the verified answer.