Calculate percentages quickly and accurately with multiple calculation modes.
¿Cuánto es el % de ?
es el ¿qué %? de
Cambio porcentual de a
Handle all common percentage scenarios: find a percentage, calculate change, or reverse-calculate.
Every calculation shows the formula and steps used, great for learning.
Get precise results in milliseconds without manual calculations.
From tips and discounts to tax amounts and grade percentages.
Percentages are one of the most commonly used mathematical concepts in daily life. From discount prices to investment returns, tax rates, and grade averages, percentages help us compare, analyze, and make decisions.
In professional settings, percentages are indispensable. Marketers track conversion rates, financial analysts calculate growth rates, scientists express concentrations, and educators grade on percentage scales.
If a rate goes from 10% to 15%, that is 5 percentage points but a 50% relative increase. These are very different.
A 50% increase followed by 50% decrease does NOT return to the original. $100 + 50% = $150, then $150 - 50% = $75.
In formulas, 5% should be 0.05, not 5. Using 5 gives results 100 times too large.
A 20% discount plus 10% discount is NOT 30%. Applied sequentially: $100 x 0.80 x 0.90 = $72 (28% total).
Multiply the number by the percentage and divide by 100. For example, 25% of 200 is (200 x 25) / 100 = 50.
Percentage change = ((New Value - Old Value) / Old Value) x 100. If a product went from $80 to $100, the change is ((100-80)/80) x 100 = 25% increase.
A percentage represents a fraction of 100. A percentile indicates what percentage of a group falls below a certain value. They measure different things.
If 30% of a number is 60, the original number is (60 / 30) x 100 = 200.
Percentages are essential for interest rates, returns on investment, tax rates, discounts, inflation, and profit margins.