Porcentagem Básica
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Questions and Answers

Um carro custa R$ 25.000. O preço aumenta 12%. Qual é o novo preço do carro?

  • R$ 3.000
  • R$ 2.500
  • R$ 28.000 (correct)
  • R$ 27.000
  • Uma televisão está à venda por R$ 1.200, com um desconto de 25%. Qual é o valor do desconto?

  • R$ 150
  • R$ 450
  • R$ 900
  • R$ 300 (correct)
  • Um smartphone custa R$ 1.800. Seu preço cai 10% devido a uma promoção. Qual é o novo preço do smartphone?

  • R$ 1.700
  • R$ 1.620 (correct)
  • R$ 1.980
  • R$ 1.500
  • Uma loja oferece um desconto fixo de R$ 50 em todos os produtos. Se um vestido custa R$ 200, qual é o preço final após o desconto?

    <p>R$ 150</p> Signup and view all the answers

    Um computador custa R$ 3.500. A loja oferece um desconto de 15% para compras à vista. Qual é o valor do desconto?

    <p>R$ 525</p> Signup and view all the answers

    Study Notes

    Percentage Basics

    • A percentage is a fraction with a denominator of 100.
    • It represents a proportion of a whole as a decimal multiplier.

    Percentage Increase

    • A percentage increase is a change that results in a value greater than the original value.
    • Formula: New Value = Original Value + (Original Value x Percentage Increase)
    • Example: If a shirt costs 50anditspriceincreasesby2050 and its price increases by 20%, the new price is 50anditspriceincreasesby2050 + (50x0.20)=50 x 0.20) = 50x0.20)=60

    Percentage Decrease

    • A percentage decrease is a change that results in a value less than the original value.
    • Formula: New Value = Original Value - (Original Value x Percentage Decrease)
    • Example: If a book costs 80anditspricedecreasesby1580 and its price decreases by 15%, the new price is 80anditspricedecreasesby1580 - (80x0.15)=80 x 0.15) = 80x0.15)=68

    Discount

    • A discount is a reduction in the original price of an item.
    • Formula: Sale Price = Original Price - (Original Price x Discount Percentage)
    • Example: If a TV costs 1,000andhasa101,000 and has a 10% discount, the sale price is 1,000andhasa101,000 - (1,000x0.10)=1,000 x 0.10) = 1,000x0.10)=900
    • Types of discounts:
      • Fixed discount: a fixed amount is subtracted from the original price.
      • Percentage discount: a percentage of the original price is subtracted.

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    Description

    Aprenda conceitos básicos de porcentagem, incluindo aumento e redução de porcentagem, fórmulas e exemplos.

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