57 marks = 76% of the highest score.<br><br>&bull; 76% → 57<br>&bull; 1% → 57 ÷ 76 = 0.75<br>&bull; 100% → 0.75 × 100 = 75<br><br>Check: 75 × 0.76 = 57. ✓<br><br>Final Answer: 75