Percentage Calculations and Profit Analysis

In this video, Professor Marcos Aba explains how to calculate percentages using practical examples. The first example involves calculating the new price of a product after a 12% increase, using different strategies such as the rule of three and direct multiplication. The second example demonstrates how to calculate the profit percentage from selling a product. The video emphasizes understanding the basic concepts of percentage calculations and encourages viewers to develop their own strategies.

What was the original price of the item in the first example?

• 300 reais

• 12 reais

• 336 reais

• 112 reais

By what percentage was the price of the item increased in the first example?

• 10%

• 15%

• 12%

• 20%

What is the new price of the item after the increase in the first example?

• 348 reais

• 312 reais

• 300 reais

• 336 reais

What is the increase in price in reais in the first example?

• 24 reais

• 48 reais

• 12 reais

• 36 reais

What is the alternative percentage used to find the new price directly in the first example?

• 120%

• 112%

• 110%

• 100%

What is the decimal equivalent of 112% used in the alternative method?

• 1.12

• 1.10

• 1.02

• 1.20

What is the cost price of the product in the second example?

• 40 reais

• 60 reais

• 30 reais

• 50 reais

What is the selling price of the product in the second example?

• 40 reais

• 52 reais

• 45 reais

• 50 reais

What is the profit in reais in the second example?

• 20 reais

• 12 reais

• 15 reais

• 10 reais

What is the profit percentage in the second example?

• 35%

• 30%

• 25%

• 20%