## Introduction

In mathematics, a word problem for a set S with respect to a system of finite encoding of its elements is the algorithmic problem of deciding whether two given representatives represent the same element of the set. Percentage is a way of expressing a number as a fraction of 100. It is often denoted using the percent sign, “%”. In this article very helpful to learn percentage in easy way with example problem.(Source: wikipedia)

## Easy Way to Learn Percentages Example Problem

To solve the percentage easy way need to learn the following formula

Percentage formula = `(Is)/(Of)` = `%/100` or part / whole = `%/100`

Percentage formula = Changes in value x 100%

Original value

**Example:**

Jessica last month earned salary `$` 1200. He earned this month salary `$` 500. Find how much percentage decreased in her salary amount.

**Solution:**

Jessica decreased salary = new salary – original salary

`$` 500 –`$` 1200 = 700

Salary percentage decrease = `700/1200` x100%= 58.33%

Jessica decreases salary percentage is 58.33%.

**Example:**

Solve 15 % of 450 is how much?

**Solution:**

Is/450= `15/100`

Let unknown variable x

`X/450` = `15/100`

by **Cross multiplication** x **×** 100 = 450 **x** 15

x **×** 100 = 6750

100x = 6750

x = `6750/100`

x = 67.5

So 15 % of 450 is 67.5

**Example:**

Kim last month earned salary `$` 1350. He earned this month salary `$` 1700. Find how many percentage increases in his salary amount.

**Solution:**

Kim increased salary = new salary – original salary

`$` 1700 –`$` 1350 = 350

Salary percentage increase = `350/1350` x100% = 25.9%

Kim increased salary percentage is 25.9%

## Easy Way to Learn Percentages Practice Problem

**Problem:**

Jack last month earned salary `$` 1000. He earned this month salary `$` 800. Find how much percentage decreased in his salary amount.

**Answer:**

Jack decreases salary percentage is 20%.

**Problem:**

Solve 20 % of 350 is how much?

**Answer:**

20 % of 350 is 70

**Problem:**

Jack last month earned salary `$` 1200. He earned this month salary` $` 900. Find how much percentage decreased in his salary amount.

**Answer:**

Jack decreases salary percentage is 25%.