Calculadora de Porcentaje Gratuita
Calcula porcentajes al instante — rápido, privado y gratis.
PercentEase is a free online percentage calculator that solves five types of problems: finding X% of Y, determining what percent X is of Y, calculating percentage change, finding the whole from a known part and percentage, and computing increase or decrease by a percentage. All calculations run instantly in your browser with no data collected. Available in 20 languages with no sign-up required.
¿Cómo usar PercentEase?
- 1
Elige tu modo de cálculo
Select from five modes: find X% of Y, determine what percent X is of Y, calculate percentage change, reverse-solve, or increase/decrease by a percentage.
- 2
Ingresa tus números
Escribe tus valores en los campos de entrada. Los resultados aparecen al instante mientras escribes.
- 3
Copia tu resultado
Your answer appears immediately below the inputs with the formula and calculation shown.
Common Percentage Calculations
| Problem | Answer |
|---|---|
| What is 10% of 100? | 10 |
| What is 15% of 200? | 30 |
| What is 20% of 50? | 10 |
| What is 25% of 80? | 20 |
| What is 30% of 150? | 45 |
| What is 50% of 60? | 30 |
| 15 is what % of 75? | 20% |
| 7 is what % of 28? | 25% |
| Change from 40 to 50 | 25% increase |
| Change from 200 to 150 | 25% decrease |
| What is 12.5% of 400? | 50 |
| 45 is what % of 180? | 25% |
Real-World Percentage Examples
Restaurant Tip
Your dinner bill is $65. You want to leave an 18% tip.
Tip = $65 × 18 ÷ 100
$11.70
Sale Discount
A jacket costs $120 and is 35% off.
Discount = $120 × 35 ÷ 100
You save $42 — pay $78
Test Score
You scored 42 out of 50 on an exam.
Grade = (42 ÷ 50) × 100
84%
Price Change
Gas went from $3.20 to $3.84 per gallon.
Change = (($3.84 − $3.20) ÷ $3.20) × 100
20% increase
Fraction ↔ Decimal ↔ Percentage
| Fraction | Decimal | Percentage |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.333 | 33.33% |
| 2/3 | 0.667 | 66.67% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 3/5 | 0.6 | 60% |
| 4/5 | 0.8 | 80% |
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 1/10 | 0.1 | 10% |
Entendiendo los Porcentajes
Un porcentaje es un número expresado como una fracción de 100. La palabra proviene del latín 'per centum', que significa 'por ciento'. Los porcentajes se usan en todas partes — desde descuentos en compras hasta tasas de interés, calificaciones de exámenes y estadísticas.
Ejemplos Rápidos
- • ¿Cuánto es 20% de 150? → 30
- • 15 es ¿qué % de 60? → 25%
- • Cambio de 50 a 75 → 50% de aumento