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Percentage Calculator

What is X% of Y?
% of =
Result
100
Formula: (P ÷ 100) × N
X is what % of Y?
is ____ % of
Percentage
25%
Formula: (X ÷ Y) × 100
Percentage Change (Increase/Decrease)
% Change
+25.00%
Increased by 50
Formula: ((New − Old) ÷ Old) × 100
Percentage Difference Between Two Numbers
% Difference
40.00%
Average: 50
Formula: |A − B| ÷ ((A + B) ÷ 2) × 100
Reverse % — Find Original Value
is % of original
Original Value
100
Formula: Final ÷ (P ÷ 100)
Discount Calculator
Final Price₹750
You Save₹250 (25%)
Discount = Price × Rate ÷ 100 ; Final = Price − Discount
Markup / Selling Price Calculator
Selling Price₹700
Profit₹200 (40%)
Selling = Cost × (1 + Markup÷100)
Tip Calculator
Tip Amount₹180
Total Bill₹1380
Per Person₹690
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Disclaimer. This tool is provided for informational and educational purposes only. While we strive for accuracy, always independently verify results before relying on them for financial, academic, or other decision-critical purposes. Read full disclaimer →

How Percentage Calculations Work

A percentage expresses a number as a fraction of 100. The three core formulas covered by this calculator:

% of a number: Result = (X ÷ 100) × N  |  % change: ((New − Old) ÷ Old) × 100  |  Part is what %: (Part ÷ Whole) × 100

Step-by-Step Worked Example

A shirt's price dropped from ₹2,000 to ₹1,500. What's the percentage decrease?

  1. Step 1: Change = New − Old = 1,500 − 2,000 = −500
  2. Step 2: Divide by original = −500 ÷ 2,000 = −0.25
  3. Result: −0.25 × 100 = −25% (a 25% decrease)

Common Percentage Scenarios

ScenarioFormulaExample
Tip on a bill(Tip % ÷ 100) × Bill18% of ₹1,200 = ₹216
Discount pricePrice − (Discount % ÷ 100 × Price)30% off ₹1,000 = ₹700
Exam score(Marks ÷ Total) × 10045/50 = 90%
Salary hike((New − Old) ÷ Old) × 100₹50k→₹60k = 20% hike

Frequently Asked Questions

To find X% of a number N, multiply: Result = (X ÷ 100) × N. For example, 20% of 150 = (20 ÷ 100) × 150 = 30.
Percentage Change = ((New Value − Old Value) ÷ Old Value) × 100. A positive result is an increase; a negative result is a decrease.
Divide the part by the whole and multiply by 100: Percentage = (Part ÷ Whole) × 100. Example: 30 is what percent of 150? (30 ÷ 150) × 100 = 20%.
A percentage point is the arithmetic difference between two percentages (50% to 55% = 5 percentage points). Percent change measures relative change (5 ÷ 50 × 100 = 10% increase). These are frequently confused in financial and news reporting.