Percentage Calculator 2026: How to Work Out a Percentage?

📊 Over 100,000 Americans use this tool. Our FREE percentage calculator 2026 answers the #1 question: "How to work out a percentage?" Calculate % of numbers, % change, weight loss %, food cost %, gross profit % & Navy body fat instantly.

🔥 Popular calculations: 20% of 80 → 16 · 50 to 75 → 50% increase · 200 to 180 lbs → 10% weight loss · $4.50 cost, $15 price → 30% food cost.

How to Work Out a Percentage? Complete 2026 Guide

📐 Basic Percentage Formulas

X% of Y: (X ÷ 100) × Y
X is what % of Y: (X ÷ Y) × 100
Percentage Change: (New - Old) ÷ Old × 100
Weight Loss %: (Lost ÷ Start) × 100
Food Cost %: (Cost ÷ Price) × 100
Gross Profit %: (Revenue - COGS) ÷ Revenue × 100

🧮 How to Calculate Percentage on a Calculator

20% of 80: 80 × 20 ÷ 100 = 16
50 to 75 (% increase): (75-50)÷50×100 = 50%
25 is what % of 200: 25÷200×100 = 12.5%
Add 20% to 80: 80 + 20% = 96
Subtract 20% from 80: 80 - 20% = 64

📊 Percentage Calculation Examples 2026

Weight Loss: 220 to 198 lbs = 10% loss
Food Cost: $5 cost, $20 price = 25%
Gross Profit: $200k revenue, $120k COGS = 40%
Tip Calculation: $50 bill, 15% tip = $7.50
Discount: $80 item, 25% off = $60

❓ Frequently Asked Questions About Percentages

How to work out a percentage on a calculator?

To work out a percentage on a calculator: 1) For X% of Y, multiply Y × X ÷ 100. Example: 20% of 80 = 80 × 20 ÷ 100 = 16. 2) For % change, (New - Original) ÷ Original × 100. Example: 50 to 75 = 50% increase.

How to calculate percentage of weight loss?

Weight loss percentage = (Weight Lost ÷ Starting Weight) × 100. Example: Start 200 lbs, lose 20 lbs = 20 ÷ 200 × 100 = 10% body weight lost.

How to calculate food cost percentage?

Food cost percentage = (Cost of Ingredients ÷ Menu Price) × 100. Example: Pizza costs $4 to make, sold for $12 = 33.3% food cost. Ideal range is 28-35%.

How to calculate gross profit percentage formula?

Gross profit percentage = (Revenue - Cost of Goods Sold) ÷ Revenue × 100. Example: Revenue $100,000, COGS $60,000 = 40% gross profit margin.

What is the Navy body fat percentage calculator?

The Navy body fat method uses circumference measurements. Our calculator uses exact Navy formulas for both men and women with simple inputs.

⚠️ General Disclaimer (Updated May 15, 2026)

Educational Tool Only: This percentage calculator is for educational and general informational purposes only. While we strive for accuracy, results should be verified for critical applications.

Medical Disclaimer: Weight loss and body fat calculations are estimates only. Consult healthcare professionals before starting any diet or fitness program.

Last Update: May 15, 2026 | Next Review: August 15, 2026 | Users: 100,000+

Percentage Calculator 2026: How to Work Out a Percentage? Free Tool for % Change, Weight Loss, Food Cost, Gross Profit & Navy Body Fat

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