# Percentage Calculator

**What is a Percentage?**

A rate is a numerical idea that addresses a number as a negligible portion of 100. It is signified by the image “%”. For example, half is comparable to 50 out of 100, or essentially half. Rates permit us to look at extents, compute increments and diminishes, and dissect information effectively.

**What is a Percentage Calculator?**

A rate number cruncher is an on the web or disconnected device that computerizes the method involved with tracking down rates. By contributing the important qualities, a rate mini-computer performs speedy calculations, giving you precise outcomes progressively. It saves time and kills the chance of mistakes, particularly while working with huge numbers or complex conditions.

**Percentage Formulas**

While a percentage calculator is an excellent tool, understanding the underlying formulas is crucial for grasping how it works. Here are some fundamental formulas for calculating percentages:

### 1. **Basic Percentage Formula**

The basic formula for finding a percentage is:

Percentage=(Part Whole)×100

Example: If you want to find what percentage 25 is of 200:

25/200×100=12.5%

### 2. **Percentage Increase/Decrease**

To calculate the percentage increase or decrease between two numbers, use the formula:

Percentage Change=(New Value−Old Value /Old Value)×100

Example: If a product’s price increases from $50 to $75, the percentage increase is:

(75−50)/50×100=50%

### 3. **Finding the Whole from a Percentage**

If you know the percentage and the part, you can find the whole using this formula:

Whole=Part/Percentage×100

Example: If 15% of a number is 30, to find the whole:

30/15×100=200

### 4. **Percentage of a Total**

To find the percentage of a total value:

Percentage of Total=(Number/Total)×100

Example: If you scored 85 out of 100 on a test:

85/100×100=85%