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Percentage Calculator

Calculate: What is X% of Y?

Result:

Save money: Calculate discount and final price

Discount Amount:

Final Price:

Add profit: Calculate markup and selling price

Markup Amount:

Final Price:

100% Free Instant Results No Sign-up High Quality

How to Use This Tool:

  1. 1Select the calculation tab (percentage, discount, or markup).
  2. 2Enter the required values in the input fields.
  3. 3Read the result instantly as values update.

Frequently Asked Questions

Yes, separate tabs are provided for percentage, discount, and markup calculations.

Percentage Formulas

Basic Percentage
X% of Y = (Y × X) ÷ 100

Example: 20% of $50 = $10

Discount
Final = Price - (Price × Discount%)

Example: $100 - 20% = $80

Markup
Final = Cost + (Cost × Markup%)

Example: $50 + 20% = $60

Real-World Uses

Shopping

Calculate sale prices and discounts while shopping

Tips & Tax

Calculate tips on restaurant bills and sales tax

Business

Calculate profit margins and retail markups

Finance

Track percentage changes in investments

Tips for Accuracy

  1. Double-check: Verify calculations manually if critical
  2. Rounding: Results shown to 2 decimal places for currency
  3. Units: Ensure values are in same currency/unit
  4. Tip Percentages: Common: 15%, 18%, 20% of bill
  1. Tax Calculation: Add tax to original price, not discounted
  2. Percentage Change: Market changes often use percentage increases
  3. Wholesale to Retail: Markup is cost-based profit
  4. Order of Operations: Apply discount before tax

Understanding Percentages

A percentage is a way of expressing a number as a fraction of 100. The word "percent" comes from the Latin "per centum," meaning "by the hundred." Percentages are used everywhere—from sales discounts to test scores, interest rates to statistics.

Basic Percentage Formula
Percentage = (Part / Whole) × 100

Example: If you scored 45 out of 50 on a test, your percentage is (45/50) × 100 = 90%

Finding the Part
Part = (Percentage / 100) × Whole

Example: 25% of $200 is (25/100) × 200 = $50

Common Percentage Scenarios

Scenario Formula Example
Sale Discount Original Price - (Original Price × Discount%) $100 item with 25% off = $100 - $25 = $75
Sales Tax Price + (Price × Tax%) $50 + 8% tax = $50 + $4 = $54
Restaurant Tip Bill × Tip% $85 bill × 20% = $17 tip ($102 total)
Profit Margin (Selling Price - Cost) / Selling Price × 100 Sell $100, Cost $60 = 40% profit margin
Percentage Change (New - Old) / Old × 100 Price rose from $50 to $60 = 20% increase
Grade Conversion (Points Earned / Total Points) × 100 36/40 questions correct = 90% score

Frequently Asked Questions

A percentage is a fraction of 100 (e.g., 75% of students passed). A percentile ranks a value within a dataset (e.g., scoring in the 75th percentile means you scored better than 75% of test-takers).

Formula: ((New Value - Old Value) / Old Value) × 100. If the result is positive, it's an increase; if negative, it's a decrease. Example: Price went from $50 to $60: ((60-50)/50) × 100 = 20% increase.

Typically, discounts are applied before tax. For example: $100 item with 20% discount and 10% tax = ($100 - $20) + ($80 × 0.10) = $88 total. However, policies vary by retailer.

In the US, standard tipping is: 15-18% for adequate service, 20% for good service, and 20-25% for excellent service. For takeout, 10% is common. For poor service, consider 10-15%.

Profit Margin = (Revenue - Cost) / Revenue × 100. Example: Item costs $60 to make, sells for $100. Profit margin = ($100 - $60) / $100 × 100 = 40%. This shows what percentage of sales is profit.
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