## Introduction

Mathematics is an essential subject that helps us make sense of the world around us. One of the most basic concepts in mathematics is percentages, which is a way of expressing a fraction as a portion of 100. In this article, we will discuss how to calculate 20 percent of 39.

### What is 20 percent of 39?

Calculating 20 percent of 39 is a simple task that anyone can do. To find out what 20 percent of 39 is, you just need to multiply 39 by 0.2. The answer is 7.8.

### Why is it important to know 20 percent of 39?

Knowing how to calculate 20 percent of 39 is important in many real-life situations. For example, if you are shopping and see a product that has a 20 percent discount, you can quickly calculate the amount of money you will save.

## Tips for Calculating Percentages

### Tip 1: Convert Percentages to Decimals

To calculate percentages, it is helpful to convert them to decimals. To convert a percentage to a decimal, simply divide it by 100. For example, 20 percent is 0.2 as a decimal.

### Tip 2: Use Proportions

Another way to calculate percentages is to use proportions. To do this, you need to set up an equation where the part is to the whole as the percentage is to 100. For example, if you want to find out what 20 percent of 39 is, you can set up the equation 20/100 = x/39.

### Tip 3: Use a Calculator

Calculating percentages can be time-consuming, especially if you have to do it often. In such cases, using a calculator can be a quick and easy solution. Most calculators have a percentage button that allows you to calculate percentages with ease.

## Real-Life Applications of 20 Percent of 39

### Application 1: Discounts

As mentioned earlier, knowing how to calculate 20 percent of 39 is crucial when shopping. If you see a product that has a 20 percent discount, you can easily calculate the amount of money you will save. For example, if the original price of a product is $39, and it has a 20 percent discount, you will save $7.8.

### Application 2: Tips and Commissions

Knowing how to calculate percentages is also essential in the service industry. For example, if you go to a restaurant and want to leave a 20 percent tip, you can quickly calculate the amount of money you need to leave. Similarly, if you work on commission and your commission is 20 percent of your sales, you can calculate your earnings by multiplying your sales by 0.2.

### Application 3: Taxes

Calculating percentages is also important when it comes to taxes. For example, if the tax rate is 20 percent, you can calculate the amount of tax you need to pay by multiplying the total amount by 0.2.

## Conclusion

In conclusion, knowing how to calculate percentages is an essential skill that has many real-life applications. Calculating 20 percent of 39 is a straightforward task that anyone can do. Whether you are shopping, leaving a tip, or calculating taxes, knowing how to calculate percentages can save you time and money.