80 5% = ?(A) 0.2(B) 2(C) 4(D) 20

80 5% = ?: Understanding the Concept of Percentage

Percentage is a way to express a value as a fraction of 100. It is denoted by the symbol '%' and is calculated by dividing the value by 100 and multiplying by 100. For example, 25% is equal to 25/100, which is equal to 0.25.

To calculate 80 5%, we need to understand that 5% is equal to 5/100, which is equal to 0.05. Now, we need to multiply 80 by 0.05 to get the result.

Step 1: Convert 5% to a decimal

5% = 5/100 = 0.05

Step 2: Multiply 80 by 0.05

80 × 0.05 = 4

Therefore, 80 5% is equal to 4.

Understanding the concept of percentage is crucial in various aspects of life, such as finance, business, and science. It helps us to calculate interest rates, discounts, and tips, and to understand complex financial concepts.

• A store offers a 5% discount on a product that costs $80. How much will you pay for the product?
• A bank offers an interest rate of 5% per annum on a deposit of $80,000. How much interest will you earn in a year?
• A restaurant offers a 5% tip on a bill of $80. How much will you pay as a tip?

• To calculate a percentage, divide the value by 100 and multiply by the percentage.
• To convert a percentage to a decimal, divide the percentage by 100.
• To calculate a percentage of a value, multiply the value by the percentage.

• Confusing percentage with fraction.
• Not converting percentage to a decimal before calculating.
• Not multiplying the value by the percentage.

In conclusion, 80 5% is equal to 4. Understanding the concept of percentage is crucial in various aspects of life, and it is essential to calculate percentages correctly to avoid errors. By following the tips and tricks provided, you can calculate percentages with ease and accuracy.

The final answer is (C) 4.
80 5% = ?: Q&A

Q: What is the formula to calculate a percentage?

A: The formula to calculate a percentage is: (value × percentage) / 100.

Q: How do I convert a percentage to a decimal?

A: To convert a percentage to a decimal, divide the percentage by 100. For example, 5% = 5/100 = 0.05.

Q: How do I calculate a percentage of a value?

A: To calculate a percentage of a value, multiply the value by the percentage. For example, 80 × 5% = 80 × 0.05 = 4.

Q: What is the difference between a percentage and a fraction?

A: A percentage is a way to express a value as a fraction of 100, while a fraction is a way to express a value as a ratio of two numbers.

Q: How do I calculate a percentage increase or decrease?

A: To calculate a percentage increase or decrease, use the formula: ((new value - old value) / old value) × 100.

Q: What is the formula to calculate a percentage of a percentage?

A: The formula to calculate a percentage of a percentage is: (percentage 1 × percentage 2) / 100.

Q: How do I calculate a percentage of a percentage of a value?

A: To calculate a percentage of a percentage of a value, multiply the value by the first percentage, then multiply the result by the second percentage. For example, 80 × 5% × 10% = 80 × 0.05 × 0.10 = 0.4.

Q: What is the difference between a percentage and a proportion?

A: A percentage is a way to express a value as a fraction of 100, while a proportion is a way to express a value as a ratio of two numbers.

Q: How do I calculate a percentage of a proportion?

A: To calculate a percentage of a proportion, multiply the proportion by the percentage. For example, 2/3 × 5% = 2/3 × 0.05 = 0.0333.

Q: What is the formula to calculate a percentage of a ratio?

A: The formula to calculate a percentage of a ratio is: (ratio × percentage) / 100.

Q: How do I calculate a percentage of a ratio of a value?

A: To calculate a percentage of a ratio of a value, multiply the value by the ratio, then multiply the result by the percentage. For example, 80 × (2/3) × 5% = 80 × 2/3 × 0.05 = 4.6667.

In conclusion, understanding the concept of percentage is crucial in various aspects of life, and it is essential to calculate percentages correctly to avoid errors. By following the tips and tricks provided, you can calculate percentages with ease and accuracy.

The final answer is (C) 4.