What is it & why use it?
Quickly calculate percentage values, percentage increase/decrease, and ratios with our Percentage Calculator. This tool on Calci.in is widely useful for students, professionals, and businesses.

Formula (explained)
Percentage = (Value ÷ Total) × 100
Increase % = ((New – Old) ÷ Old) × 100
Decrease % = ((Old – New) ÷ Old) × 100
Variables: Value = part, Total = whole, Old/New = previous and updated numbers.

Example calculation
Value = 50, Total = 200 → (50 ÷ 200) × 100 = 25%.

Benefits & use cases
• Quickly find percent values
• Useful for exams and finance
• Calculate profit/loss, discounts, and grades

Related calculators on Calci.in
Fraction Calculator
Ratio Calculator
Age Calculator

External references (authority sources)
Math is Fun – Percentages
Khan Academy – Percentages

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FAQs
Q1: What is percentage used for?
A: It is used to express numbers as parts of 100 for easier comparison.
Q2: How do I calculate percentage increase?
A: Subtract old from new, divide by old, then multiply by 100.
Q3: Can I use this for exam marks?
A: Yes, simply divide obtained marks by total marks and multiply by 100.
Q4: Is this useful in business?
A: Yes, it helps in profit margins, discounts, and financial analysis.