How to Calculate Percentage from Marks

Calculating percentage from marks is one of the most basic mathematical operations students need to perform. Here's how to do it correctly.

The Basic Formula

Percentage = (Obtained Marks / Total Marks) × 100

This formula works for any type of marks — exam scores, assignment marks, test scores, or any other evaluation.

Step-by-Step Process

1. Find your obtained marks — The marks you scored in the exam or test.
2. Find the total marks — The maximum marks possible.
3. Divide — Divide obtained marks by total marks.
4. Multiply by 100 — Multiply the result by 100 to get the percentage.

Examples

Example 1: You scored 85 marks out of 100

Percentage = (85 / 100) × 100 = 85%

Example 2: You scored 420 marks out of 500

Percentage = (420 / 500) × 100 = 84%

Example 3: You scored 156 marks out of 200

Percentage = (156 / 200) × 100 = 78%

Handling Multiple Subjects

If you need to calculate overall percentage across multiple subjects:

1. Add up all obtained marks across subjects
2. Add up all total marks across subjects
3. Apply the same formula: (Total Obtained / Total Possible) × 100

Rounding

Most institutions round percentages to one or two decimal places. Our Marks Percentage Calculator automatically handles the rounding for you.

Quick Reference

• 90 out of 100 = 90%
• 75 out of 100 = 75%
• 180 out of 200 = 90%
• 350 out of 500 = 70%
• 425 out of 500 = 85%