Enter correct/wrong answers and the negative-marking rule to see your real net score and percentage.
Each wrong answer deducts marks instead of just not counting: Net Score = (Correct × Marks/Correct) − (Wrong × Negative Marks/Wrong). A common NTS/FPSC-style rule deducts 0.25 marks per wrong answer on a 1-mark question, but the exact ratio varies by exam — set it in the fields above.
It depends on the ratio. With a 1 correct / 0.25 wrong penalty, guessing among 4 options has a positive expected value on average; with a 1-for-1 penalty, random guessing is expected-value neutral. If you can eliminate even one wrong option, guessing among the rest is usually still worth it under a 0.25 penalty.
Raw % ignores the penalty and just scores correct answers out of the maximum; Net % applies the negative-marking deduction. The gap between the two shows exactly how many percentage points the wrong answers cost you.