Free BMI Calculator to check your Body Mass Index instantly.

Percentage Calculator

Percent (%)

of

Result

—

Common Phrases

What is

of

Answer

—

_____ is what % of

Whole

Answer

—

_____ is

% of what

Answer

—

Percentage Difference

Value 1

Value 2

Difference

—

Percentage Change

Start / Base

Type Increase Decrease

%

Result

—

 

Introduction

Percentages are everywhere in our daily lives—whether it’s discounts while shopping, calculating interest rates, tax deductions, exam scores, salary hikes, or financial planning. Understanding percentages is essential, but doing manual percentage calculations can sometimes feel confusing. That’s where a Percentage Calculator comes in.

In this blog, we’ll cover:

• What a Percentage Calculator is
• How to use it for different purposes
• Real-life applications of percentages
• Step-by-step formulas and manual methods
• Benefits of using an online calculator
• FAQs about percentage calculation

By the end, you’ll not only master percentage calculations but also know how to use a percentage calculator online to save time and avoid mistakes.

---

What is a Percentage?

The word percentage comes from the Latin “per centum,” meaning “by the hundred.” Simply put, a percentage is a fraction of 100.

For example:

• 50% = 50/100 = 0.5
• 25% = 25/100 = 0.25
• 100% = 100/100 = 1

Percentages make it easy to compare values because everything is scaled to 100.

---

What is a Percentage Calculator?

A Percentage Calculator is an online or digital tool that simplifies percentage-related math. Instead of working out long formulas, you just enter numbers, and the calculator instantly provides the result.

It can solve:

• Percentage increase/decrease
• Percentage of a number
• Converting decimals and fractions into percentages
• Finding discounts and profit margins
• Tax and interest calculations

---

Why Use a Percentage Calculator?

1. Saves Time: No manual calculation needed.
2. Error-Free: Reduces human mistakes.
3. User-Friendly: Works with simple inputs.
4. Versatile: Useful for students, professionals, and shoppers.
5. Accessible Anywhere: Online and mobile-friendly.

---

Common Percentage Calculations

1. Finding the Percentage of a Number

Formula:

$$\text{Percentage of a number} = \frac{\text{Part}}{\text{Whole}} \times 100$$

Example: What is 20% of 500?

$$500 \times \frac{20}{100} = 100$$

2. Percentage Increase

Formula:

$$\text{Increase \%} = \frac{\text{New Value – Old Value}}{\text{Old Value}} \times 100$$

Example: Salary increased from $40,000 to $50,000.

$$\frac{50,000 - 40,000}{40,000} \times 100 = 25\%$$

3. Percentage Decrease

Formula:

$$\text{Decrease \%} = \frac{\text{Old Value – New Value}}{\text{Old Value}} \times 100$$

Example: Price dropped from $200 to $150.

$$\frac{200 - 150}{200} \times 100 = 25\%$$

4. Converting Fractions and Decimals to Percentages

• 0.25 → 25%
• ¾ = 0.75 → 75%

5. Reverse Percentage

Used when finding the original value before the percentage change.

---

Real-Life Uses of Percentage Calculators

1. Shopping Discounts – Quickly calculate sale prices.
2. Finance & Banking – Interest rates, loan percentages, EMI breakdowns.
3. Education – Calculate marks in exams.
4. Business & Marketing – Profit margins, tax deductions, commission.
5. Health & Fitness – Body fat percentage, nutrition intake.
6. Daily Life – Tip calculation at restaurants, budgeting.

---

Benefits of Using an Online Percentage Calculator

• Free to use
• Mobile-friendly
• Works instantly
• No math skills required
• Accurate every time

---

Step-by-Step: How to Use a Percentage Calculator

1. Open the percentage calculator tool.
2. Select the type of calculation (percentage of a number, increase, decrease, etc.).
3. Enter the values.
4. Get instant results.

---

Percentage Calculator Examples

• Example 1: You scored 450 marks out of 600. What is your percentage?

$$\frac{450}{600} \times 100 = 75\%$$

• Example 2: A $120 item has a 15% discount. What’s the sale price?

$$120 \times \frac{15}{100} = 18$$

Final Price = $120 – $18 = $102

• Example 3: Your company’s revenue grew from $1M to $1.3M. What’s the growth %?

$$\frac{1.3M – 1M}{1M} \times 100 = 30\%$$

---

Percentage Conversion Table

Decimal	Fraction	Percentage
0.1	1/10	10%
0.25	1/4	25%
0.5	1/2	50%
0.75	3/4	75%
1.0	1/1	100%

---

Advanced Percentage Applications

• Compound Interest: Interest on interest.
• Profit & Loss Analysis
• Tax Calculations (GST, VAT, Income Tax)
• Market Analysis in Business
• Data Analysis & Statistics

---

Tips for Mastering Percentages

1. Memorize fraction-to-percentage conversions.
2. Practice with real-life examples.
3. Always double-check with a calculator.
4. Understand the formulas, not just shortcuts.

---

(naturally included in text)

• Percentage calculator online
• Percentage increase calculator
• Percentage decrease calculator
• Find percentage of a number
• Online discount calculator
• Convert fraction to percentage
• Reverse percentage calculator
• Interest rate percentage calculator

---

Frequently Asked Questions (FAQ)

Q1: What is a percentage calculator used for?
It helps calculate percentages quickly—such as discounts, interest rates, tax, and exam scores—without manual effort.

Q2: How do I calculate 20% of a number?
Multiply the number by 20/100. Example: 20% of 250 = 250 × 0.20 = 50.

Q3: Can I use a percentage calculator for tax and GST?
Yes. Simply input the tax percentage and original price to get the final cost.

Q4: What’s the difference between percentage increase and decrease?
Increase is when value grows, decrease is when value drops compared to the original number.

Q5: Is an online percentage calculator free?
Yes, most are free and available on any device.

---

Conclusion

A Percentage Calculator is one of the most useful digital tools for students, professionals, businesses, and everyday users. Instead of wasting time on manual calculations, you can instantly find accurate results for discounts, taxes, interest, growth rates, exam marks, and more.

By mastering percentages and using a calculator, you’ll not only save time but also make better financial and daily decisions.