Percentage calculator is a free online tool that allows you to find the percentage change, difference, and increase or decrease online.
Do you know the most interesting thing about this Percentage Calculator? We have used 4 most common phrases here for better understanding. Also, you can use any part of the tool free of cost without any problem. As you can see, the user interface has a lot of things. But don't worry about it. The user experience remains simple and smooth. That's why we have included phrases to tell about the functionality. So, users can easily find the percent(%) values as per their need.
In addition, you don't need to think or remember the formulas to do the calculation. Just enter the values inside the calculator and get the results very fast. Also, in this article, you will get important information regarding the percentage calculation with formulas and examples. Just stay tuned and read the full article.
The word "Percentage" has been derived from the Latin word "Per Centum" that means "By a Hundred". When we say percent, we actually say "Per Hundred".
Generally, we use these following terms so many times in our routine life.
In other words, it is the best way to represent "How much" or "How many". Even more, you can use it to show changes, increase or decrease ratio, difference, and a portion of any physical thing.
Also, in statistics, the percentage is very important. Because it sounds more technical to say 50% rather than saying 0.5. Therefore, it is a more convenient way to represent fractions.
There are many formulas and solutions to find the percentage manually. But the most common formula is as below.

=  P × 100 
Where,
From this formula, we can make many variations. But we have only used four most common variations in our percentage calculator. Because they are used in the majority of cases.
The variations are:
Now, let's discuss its formula with some examples one by one.
Also, don't worry about remembering the formulas and calculations. Because it is for learning and knowledge purpose. In regular usage, you can use our percentage calculator and get rid of these manual calculations.
Let's take an example for more clarification.
Firstly, let's differentiate the values from the question.
In our case,
Place above all values in the formula:
18% × 120 = B
Now firstly, we have to convert percentage value into decimal. For that, we can remove the % sign and divide the percentage value with 100.

=  0.18 
Place the decimal value in the equation and multiply with A value.
0.18 × 120 = 21.6
Finally we get, B = 21.6
Formula: 

=  P% 
Here,
So, the equation will be:

=  0.167 
Note: The above result is in decimal form. So, we need to multiply the result by 100 to convert it into a percent.
0.167 × 100 = 16.7%
Finally we get, P = 16.7%
Formula: 

=  A 
In this case,
Let's place above all values in the formula:

=  A 
Firstly, convert the 15% into decimal. So, we will divide the 15 by 100.

=  0.15 
Now get back to the formula and place the decimal value.

=  200 
Therefore, A = 200.
Using this formula, we can find the percent change between the two values.
Formula: 

=  P% 
Here,

= 

=  0.571 
Now convert the 0.571 into percent.
0.571 × 100 = 57.1%
So, P = 57.1%
You can convert any percentage values into fractions or decimals using our tool. This feature is at the bottom of the calculator. Even more, it allows you to do the reverse conversion too. For example, fraction to decimal to percent or decimal to fraction to percent. So, we can find any values in between these three.
50%  = 

=  0.5 
Nowadays, online users always need efficient, alltime handy, accurate, and easytouse calculators. So, they can use it anytime and anywhere. Our tool stands out to be the best in all these terms. Also, every part of the calculator has its own functionality and everything is free to use. Let's know how to use them.
We have developed 5 different sections in Percentage Calculator. Each has different mechanisms. But the usage process is similar for all. So, here we will discuss only one section. Later you can follow the same process to operate others.
When you open the website, you can see many blank input boxes. So, firstly, you have to decide what type of calculation do you want to do. There are many phrases available. So, choose anyone.
Then you can input the values or numbers inside the empty boxes.
Lastly, press the "Calculate" button. As a result, you will get the conversion result below with full math calculation. Also, you can empty all the fields using the "Reset All" button. It will refresh the calculator.
Repeat the same process for other phrases. That's it.
Above all information was about the Percentage Calculator. Now, you know the answer to "How do I Calculate a Percentage?". This web application has all the things that you need from a basic to an advanced level. No charges or hidden cost to using it. Also, there is no usage limit. So, use this as many times as you want.