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 ?



Rounding


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 = 2.7 X = 67 X = 117 X = 217
P=5%5% of 2.75% of 675% of 1175% of 217
P=10%10% of 2.710% of 6710% of 11710% of 217
P=15%15% of 2.715% of 6715% of 11715% of 217
P=20%20% of 2.720% of 6720% of 11720% of 217
P=25%25% of 2.725% of 6725% of 11725% of 217
P=30%30% of 2.730% of 6730% of 11730% of 217
P=35%35% of 2.735% of 6735% of 11735% of 217
P=40%40% of 2.740% of 6740% of 11740% of 217
P=45%45% of 2.745% of 6745% of 11745% of 217
P=50%50% of 2.750% of 6750% of 11750% of 217
P=55%55% of 2.755% of 6755% of 11755% of 217
P=60%60% of 2.760% of 6760% of 11760% of 217
P=65%65% of 2.765% of 6765% of 11765% of 217
P=70%70% of 2.770% of 6770% of 11770% of 217
P=75%75% of 2.775% of 6775% of 11775% of 217
P=80%80% of 2.780% of 6780% of 11780% of 217
P=85%85% of 2.785% of 6785% of 11785% of 217
P=90%90% of 2.790% of 6790% of 11790% of 217
P=95%95% of 2.795% of 6795% of 11795% of 217
P=100%100% of 2.7100% of 67100% of 117100% of 217

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 = 2.7 Y = 37 Y = 67 Y = 117 Y = 217
X=55 is what % of 2.75 is what % of 375 is what % of 675 is what % of 1175 is what % of 217
X=1010 is what % of 2.710 is what % of 3710 is what % of 6710 is what % of 11710 is what % of 217
X=1515 is what % of 2.715 is what % of 3715 is what % of 6715 is what % of 11715 is what % of 217
X=2020 is what % of 2.720 is what % of 3720 is what % of 6720 is what % of 11720 is what % of 217
X=2525 is what % of 2.725 is what % of 3725 is what % of 6725 is what % of 11725 is what % of 217
X=3030 is what % of 2.730 is what % of 3730 is what % of 6730 is what % of 11730 is what % of 217
X=3535 is what % of 2.735 is what % of 3735 is what % of 6735 is what % of 11735 is what % of 217
X=4040 is what % of 2.740 is what % of 3740 is what % of 6740 is what % of 11740 is what % of 217
X=4545 is what % of 2.745 is what % of 3745 is what % of 6745 is what % of 11745 is what % of 217
X=5050 is what % of 2.750 is what % of 3750 is what % of 6750 is what % of 11750 is what % of 217
X=5555 is what % of 2.755 is what % of 3755 is what % of 6755 is what % of 11755 is what % of 217
X=6060 is what % of 2.760 is what % of 3760 is what % of 6760 is what % of 11760 is what % of 217
X=6565 is what % of 2.765 is what % of 3765 is what % of 6765 is what % of 11765 is what % of 217
X=7070 is what % of 2.770 is what % of 3770 is what % of 6770 is what % of 11770 is what % of 217
X=7575 is what % of 2.775 is what % of 3775 is what % of 6775 is what % of 11775 is what % of 217
X=8080 is what % of 2.780 is what % of 3780 is what % of 6780 is what % of 11780 is what % of 217
X=8585 is what % of 2.785 is what % of 3785 is what % of 6785 is what % of 11785 is what % of 217
X=9090 is what % of 2.790 is what % of 3790 is what % of 6790 is what % of 11790 is what % of 217
X=9595 is what % of 2.795 is what % of 3795 is what % of 6795 is what % of 11795 is what % of 217
X=100100 is what % of 2.7100 is what % of 37100 is what % of 67100 is what % of 117100 is what % of 217

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 = 2.7 Y = 67 Y = 217 Y = 517 Y = 1017
X = 1010 to 2.710 to 6710 to 21710 to 51710 to 1017
X = 2020 to 2.720 to 6720 to 21720 to 51720 to 1017
X = 3030 to 2.730 to 6730 to 21730 to 51730 to 1017
X = 4040 to 2.740 to 6740 to 21740 to 51740 to 1017
X = 5050 to 2.750 to 6750 to 21750 to 51750 to 1017
X = 6060 to 2.760 to 6760 to 21760 to 51760 to 1017
X = 7070 to 2.770 to 6770 to 21770 to 51770 to 1017
X = 8080 to 2.780 to 6780 to 21780 to 51780 to 1017
X = 9090 to 2.790 to 6790 to 21790 to 51790 to 1017
X = 100100 to 2.7100 to 67100 to 217100 to 517100 to 1017
X = 110110 to 2.7110 to 67110 to 217110 to 517110 to 1017
X = 120120 to 2.7120 to 67120 to 217120 to 517120 to 1017
X = 130130 to 2.7130 to 67130 to 217130 to 517130 to 1017
X = 140140 to 2.7140 to 67140 to 217140 to 517140 to 1017
X = 150150 to 2.7150 to 67150 to 217150 to 517150 to 1017
X = 160160 to 2.7160 to 67160 to 217160 to 517160 to 1017
X = 170170 to 2.7170 to 67170 to 217170 to 517170 to 1017
X = 180180 to 2.7180 to 67180 to 217180 to 517180 to 1017
X = 190190 to 2.7190 to 67190 to 217190 to 517190 to 1017
X = 200200 to 2.7200 to 67200 to 217200 to 517200 to 1017
Percentage Calculator Online