Find the Percent of a Number
Name Period
Objectives / Objetivos
Content Objective: I can find the percent of a number using an equation or a model.
Language Objective: I can explain my steps using the words percent, base, part, and equation.
Key Idea / Idea clave
To find the part, change the percent to a decimal, then multiply: part = percent × base.
I Notice / Observo
- What information do you need to find the discount amount?
- How is finding 25% of 60 different from finding 40% of 80?
I Wonder / Me pregunto
- Is there more than one way to find a percent of a number?
Vocabulary / Vocabulario
| Term / Término | Definition / Definición |
|---|---|
| Percent Porcentaje | A way to compare a number to 100, shown with the % sign. Una manera de comparar un número con 100, con el signo %. |
| Base Base (el todo) | The whole amount you take a percent of. La cantidad total de la que sacas un porcentaje. |
| Part Parte | The piece you get when you take a percent of a number. La parte que obtienes al sacar un porcentaje de un número. |
| Equation Ecuación | A math sentence with an equal sign showing both sides are the same. Una oración matemática con un signo igual que muestra que ambos lados son iguales. |
| Discount Descuento | Money taken off the first price to make it cheaper. Dinero que se quita del precio original para que sea más barato. |
Practice Preview / Vista previa de práctica
- What is 20% of 150?
- 30
- 20
- 35
- 75
- Complete each row to find the percent of a number.
- An arcade prize costs 240 tickets. If you have a coupon for 15% off, how many tickets do you save?
- 36 tickets
- 24 tickets
- 15 tickets
- 204 tickets
- Find the Percent Error
- Step 1: Find 30% of 90 — 30% of 90
- Step 2: Convert percent to decimal — 30% = 3.0
- Step 3: Multiply — 3.0 × 90 = 270
- Step 4: Final answer — 30% of 90 = 270
Which step has the mistake? Explain it and write the correct work.
Reflection / Reflexión
One thing I learned today / Una cosa que aprendí hoy: