Percentage Calculator

Percentage Calculator is a super easy to use & free online tool to calculate percentages.

What is % of ?

is what % of ?

What is the % increase/decrease
from to ?




How shall I use the Percentage Calculator?

The use of the Percentage Calculator is very straightforward: Enter the missing values, then click on the = button. You will see the results of the percentage calculation immediately. PercentageCalc.org helps you to run the three most common percentage calculations quickly and easily.

You can also download our Percentage Calculator in Excel.

What is percentage?

A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%". A percentage is a dimensionless number; it has no unit of measurement. Percentages are often used to express a proportionate part of a total.

You can convert percent to fraction and also to decimal very easily. For example: \(75\%\) = \(75 \over 100 \) = \(0.75\)

How is percentage calculated?

It depends on the subject, more precisely on the thing you would like to calculate. There are several formulas for percentage calculations. The website PercentageCalc.org contains the three most common calculations. You will find their detailed description below. These formulae are:

1. Percentage of a value calculation -> What is P percent of X

2. Percentage calculation -> X is what percent of Y

3. Percentage change calculation -> Find the percentage change from X to Y

1. Percentage of a value calculation

This might be the most common case: You would like to calculate a certain percentage of something. To put it in another way, you would like to know what P per cent of X is. For example, you would like to know what 20 percent of 80 dollars is.

We use the following formula: \(\text{Percentage of a value} = X \cdot P\%\)

The calculation is as follows: \(80\cdot20\%\) = \(80\cdot{20 \over 100}\) = \(80\cdot0.2\) = \(16\).

Percentage Calculator Examples: Percentage of a value calculation

What is P% of X? X = 1.7 X = 57 X = 107 X = 207
P=5%5% of 1.75% of 575% of 1075% of 207
P=10%10% of 1.710% of 5710% of 10710% of 207
P=15%15% of 1.715% of 5715% of 10715% of 207
P=20%20% of 1.720% of 5720% of 10720% of 207
P=25%25% of 1.725% of 5725% of 10725% of 207
P=30%30% of 1.730% of 5730% of 10730% of 207
P=35%35% of 1.735% of 5735% of 10735% of 207
P=40%40% of 1.740% of 5740% of 10740% of 207
P=45%45% of 1.745% of 5745% of 10745% of 207
P=50%50% of 1.750% of 5750% of 10750% of 207
P=55%55% of 1.755% of 5755% of 10755% of 207
P=60%60% of 1.760% of 5760% of 10760% of 207
P=65%65% of 1.765% of 5765% of 10765% of 207
P=70%70% of 1.770% of 5770% of 10770% of 207
P=75%75% of 1.775% of 5775% of 10775% of 207
P=80%80% of 1.780% of 5780% of 10780% of 207
P=85%85% of 1.785% of 5785% of 10785% of 207
P=90%90% of 1.790% of 5790% of 10790% of 207
P=95%95% of 1.795% of 5795% of 10795% of 207
P=100%100% of 1.7100% of 57100% of 107100% of 207

2. Percentage calculation

In this case you would like to know that X what percent of Y is? For example, you know that you have 20 apples left out of 80 apples. What percent of 80 apples is 20 apples then?

We use the following formula: \(\text{Percentage calculation} = {X \over Y}\)

The calculation is as follows: \({20\over80}\) = \(0.25\) = \(25\%\)

Percentage Calculator Examples: Percentage calculation

X is what % of Y? Y = 1.7 Y = 27 Y = 57 Y = 107 Y = 207
X=55 is what % of 1.75 is what % of 275 is what % of 575 is what % of 1075 is what % of 207
X=1010 is what % of 1.710 is what % of 2710 is what % of 5710 is what % of 10710 is what % of 207
X=1515 is what % of 1.715 is what % of 2715 is what % of 5715 is what % of 10715 is what % of 207
X=2020 is what % of 1.720 is what % of 2720 is what % of 5720 is what % of 10720 is what % of 207
X=2525 is what % of 1.725 is what % of 2725 is what % of 5725 is what % of 10725 is what % of 207
X=3030 is what % of 1.730 is what % of 2730 is what % of 5730 is what % of 10730 is what % of 207
X=3535 is what % of 1.735 is what % of 2735 is what % of 5735 is what % of 10735 is what % of 207
X=4040 is what % of 1.740 is what % of 2740 is what % of 5740 is what % of 10740 is what % of 207
X=4545 is what % of 1.745 is what % of 2745 is what % of 5745 is what % of 10745 is what % of 207
X=5050 is what % of 1.750 is what % of 2750 is what % of 5750 is what % of 10750 is what % of 207
X=5555 is what % of 1.755 is what % of 2755 is what % of 5755 is what % of 10755 is what % of 207
X=6060 is what % of 1.760 is what % of 2760 is what % of 5760 is what % of 10760 is what % of 207
X=6565 is what % of 1.765 is what % of 2765 is what % of 5765 is what % of 10765 is what % of 207
X=7070 is what % of 1.770 is what % of 2770 is what % of 5770 is what % of 10770 is what % of 207
X=7575 is what % of 1.775 is what % of 2775 is what % of 5775 is what % of 10775 is what % of 207
X=8080 is what % of 1.780 is what % of 2780 is what % of 5780 is what % of 10780 is what % of 207
X=8585 is what % of 1.785 is what % of 2785 is what % of 5785 is what % of 10785 is what % of 207
X=9090 is what % of 1.790 is what % of 2790 is what % of 5790 is what % of 10790 is what % of 207
X=9595 is what % of 1.795 is what % of 2795 is what % of 5795 is what % of 10795 is what % of 207
X=100100 is what % of 1.7100 is what % of 27100 is what % of 57100 is what % of 107100 is what % of 207

3. Percentage change calculation

Percentage change calculation is used to determine the change between the start value and the end value. This formula also helps you to decide whether you can talk about an increase or a decrease. For example, the price of a product changed from 200 to 300. What percentage change could it mean?

We use the following formula: \(\text{Percentage change}\) = \({(\text{End Value} - \text{Start Value})\over\text{Start Value}}\) \(\cdot 100\%\)

The calculation is as follows: \({(350-200) \over 200} \cdot 100\%\) = \({150 \over 200} \cdot 100\%\) = \(0.75 \cdot 100\%\)= \(75\%\)

The result of this type of calculation can be positive or negative. If the result is positive, it is called percentage increase (just like in our example above). If the result is positive, it is called percentage decrease.

Percentage Calculator Examples: Percentage change calculation

What is the % increase/decrease
from X to Y ?

X to Y Y = 1.7 Y = 57 Y = 207 Y = 507 Y = 1007
X = 1010 to 1.710 to 5710 to 20710 to 50710 to 1007
X = 2020 to 1.720 to 5720 to 20720 to 50720 to 1007
X = 3030 to 1.730 to 5730 to 20730 to 50730 to 1007
X = 4040 to 1.740 to 5740 to 20740 to 50740 to 1007
X = 5050 to 1.750 to 5750 to 20750 to 50750 to 1007
X = 6060 to 1.760 to 5760 to 20760 to 50760 to 1007
X = 7070 to 1.770 to 5770 to 20770 to 50770 to 1007
X = 8080 to 1.780 to 5780 to 20780 to 50780 to 1007
X = 9090 to 1.790 to 5790 to 20790 to 50790 to 1007
X = 100100 to 1.7100 to 57100 to 207100 to 507100 to 1007
X = 110110 to 1.7110 to 57110 to 207110 to 507110 to 1007
X = 120120 to 1.7120 to 57120 to 207120 to 507120 to 1007
X = 130130 to 1.7130 to 57130 to 207130 to 507130 to 1007
X = 140140 to 1.7140 to 57140 to 207140 to 507140 to 1007
X = 150150 to 1.7150 to 57150 to 207150 to 507150 to 1007
X = 160160 to 1.7160 to 57160 to 207160 to 507160 to 1007
X = 170170 to 1.7170 to 57170 to 207170 to 507170 to 1007
X = 180180 to 1.7180 to 57180 to 207180 to 507180 to 1007
X = 190190 to 1.7190 to 57190 to 207190 to 507190 to 1007
X = 200200 to 1.7200 to 57200 to 207200 to 507200 to 1007
Percentage Calculator Online