Raman secured 750 in aggregate in the half-yearly examination in class 7. In the final examination, Raman's aggregate marks reduced to 720. Find the percentage decrease in Raman's marks.

Answer

To find the percentage decrease in Raman's marks from the half-yearly examination to the final examination, we can follow these steps:

### Step 1: Identify the initial and final marks
- Initial marks (half-yearly examination) = 750
- Final marks (final examination) = 720

### Step 2: Calculate the decrease in marks
- Decrease in marks = Initial marks - Final marks
- Decrease in marks = 750 - 720 = 30

### Step 3: Calculate the percentage decrease
- Percentage decrease = (Decrease in marks / Initial marks) × 100
- Percentage decrease = (30 / 750) × 100

### Step 4: Simplify the fraction
- Percentage decrease = (1/25) × 100
- Percentage decrease = 4%

### Conclusion
The percentage decrease in Raman's marks is 4%.

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