## Introduction

Mathematics is an essential subject that plays a significant role in our daily lives. One of the fundamental concepts in mathematics is percentages, which is used in various fields, including finance, science, and medicine. In this article, we will explore the concept of finding 30 percent of 15 in relaxed English language.

## What is a Percentage?

A percentage is a way of expressing a number as a fraction of 100. It is denoted by the symbol %, and it is used to compare values or quantities. For instance, if you score 70% on a test, it means that you got 70 questions right out of 100.

## Calculating 30 Percent of 15

To find 30 percent of 15, we need to multiply 15 by 30 and divide the product by 100. We can use the following formula to find the answer: 30% of 15 = (30/100) * 15

### Step-by-Step Guide

Here is a step-by-step guide on how to calculate 30 percent of 15: 1. Convert the percentage to a decimal by dividing it by 100. In this case, 30/100 = 0.3 2. Multiply the decimal by the number you want to find the percentage of. In this case, 0.3 * 15 = 4.5 3. The answer is 4.5, which means that 30 percent of 15 is 4.5.

## Real-Life Applications

The concept of finding percentages is used in various fields, including:

### 1. Finance

Percentage is used in finance to calculate interest rates, profit margins, and taxes. For instance, when you take a loan, the interest rate is expressed as a percentage, and you need to calculate how much interest you will pay over the life of the loan.

### 2. Science

Percentage is used in science to express concentrations, such as the percentage of alcohol in a drink or the percentage of oxygen in the air.

### 3. Medicine

Percentage is used in medicine to express the effectiveness of treatments or the prevalence of diseases. For instance, the success rate of a particular treatment may be expressed as a percentage.

## Conclusion

In summary, finding 30 percent of 15 is a simple calculation that involves multiplying 15 by 30 and dividing the product by 100. Percentages are used in various fields, including finance, science, and medicine, to express values and quantities. By understanding the concept of percentages, you can make informed decisions and solve everyday problems.