🔢 All-in-One Percentage Tool

Percentage Calculator

Q: How to calculate percentage of marks?

% = (Obtained ÷ Total) × 100. Example: 430/500 × 100 = 86%.

Q: What is percentage formula?

Percentage = (Part ÷ Whole) × 100.

All types of percentage calculations in one place — X% of Y, marks %, increase/decrease, discount, difference and more. 100% free, instant results, no signup.

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Find: What is X% of Y? | Example: What is 15% of 250?

Percentage (X %)

Number (Y)

Result

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Find: Percentage increase or decrease from old to new value

Old Value

New Value

Percentage Change

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Find: Percentage of marks obtained in exam

Marks Obtained

Total Marks

Your Percentage

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Find: Final price after discount — how much do you save?

Original Price (₹)

Discount (%)

Final Price

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Original—

You Save—

Discount—

Find: X is what % of Y? | Example: 50 is what % of 200?

Number (X)

Total (Y)

Result

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All Percentage Formulas — Quick Reference

1. What is X% of Y?

Result = (X ÷ 100) × Y

Example: 20% of 500 = (20÷100)×500 = 100

2. X is what % of Y?

% = (X ÷ Y) × 100

Example: 50 is what % of 200 = (50÷200)×100 = 25%

3. Percentage Increase

% Increase = ((New – Old) ÷ Old) × 100

Example: 500→600 = ((600–500)÷500)×100 = 20%

4. Percentage Decrease

% Decrease = ((Old – New) ÷ Old) × 100

Example: 600→450 = ((600–450)÷600)×100 = 25%

Frequently Asked Questions

% = (Obtained ÷ Total) × 100. Example: 430÷500×100 = 86%.

20% of 500 = (20÷100)×500 = 100.

% Increase = ((New–Old)÷Old)×100. Example: ₹25,000→₹30,000 = (5000÷25000)×100 = 20%.

30% of 1000 = (30÷100)×1000 = 300.

Discount% = ((Original–Sale)÷Original)×100. Example: ₹500→₹400 = (100÷500)×100 = 20%.

Use formula: =A1/B1*100 or just =A1/B1 then format cell as Percentage.

Basic formula: Percentage = (Part÷Whole)×100. This applies to marks, increase, discount, and all other percentage calculations.