Cálculo de Porcentajes

Calcular cuánto es el X% de un número dado.

Aprender

Calcular cuánto es el X% de un número dado.

Finding a percentage of a number is one of the most fundamental numerical operations. To find X% of Y, multiply Y by X and divide by 100, or equivalently, multiply Y by the decimal form of X (X/100). This skill is essential for calculating discounts, tips, taxes, and portions.

X% of Y = Y × (X/100) = Y × 0.0X

What is 25% of 80? → 80 × 0.25 = 20
What is 15% of 200? → 200 × 0.15 = 30
What is 40% of 150? → 150 × 0.40 = 60

Cómo reconocerlo

Look for 'what is X% of Y' phrasing
Convert the percentage to decimal (divide by 100)
Multiply the base number by the decimal

Errores comunes

Forgetting to divide the percentage by 100
Multiplying by the percentage directly (25 instead of 0.25)
Confusing 'of' with 'off' (discount calculations)

Resolución paso a paso

¿Cuánto es el 15% de 80?

Convierte el porcentaje a decimal: 15/100 = 0.15
Multiplica el número base por el decimal: 80 x 0.15
Calcula: 80 x 0.15 = 12

Respuesta: 12

Orientación para practicar

Razonamiento Numérico