Calculate percentages, percentage increase, percentage decrease, and find what percentage one number is of another.
This calculator helps you solve common percentage problems. Choose from different calculation types: find what percentage one number is of another, calculate percentage increase or decrease, or find a percentage of a number.
Percentages are used everywhere in daily life, from calculating discounts and sales tax to understanding statistics and financial reports.
Multiply the number by the percentage and divide by 100. For example, 20% of 50 is (20 × 50) / 100 = 10.
Divide X by Y and multiply by 100. For example, 10 is what percent of 50? (10 / 50) × 100 = 20%.
Calculate the difference, divide by the original value, and multiply by 100. For example, increase from 50 to 60: ((60 - 50) / 50) × 100 = 20% increase.
Calculate the difference, divide by the original value, and multiply by 100. For example, decrease from 60 to 50: ((60 - 50) / 60) × 100 = 16.67% decrease.
Calculate sale prices and savings. If a $100 item is 30% off, you save $30 and pay $70.
Add sales tax to purchase prices. With 8% tax on a $50 item, you pay $50 + ($50 × 0.08) = $54.
Calculate restaurant tips. A 20% tip on a $75 bill is $15, making the total $90.
Convert test scores to percentages. If you got 45 out of 50 questions correct, that's 90%.
Track investment returns and salary increases. A portfolio growing from $10,000 to $12,000 is a 20% gain.
Percentage points are different from percentages. If interest rates increase from 5% to 8%, that's a 3 percentage point increase, but a 60% relative increase.
This distinction is important in finance, economics, and statistics. Always clarify whether you're discussing percentage points or percentage change.
Calculate percentage increase
Calculate percentage decrease
Calculate percentage difference
Calculate with fractions
Calculate ratios and proportions
Calculate mean average