Percentage Calculator

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 = 2.5	X = 65	X = 115	X = 215
P=5%	5% of 2.5	5% of 65	5% of 115	5% of 215
P=10%	10% of 2.5	10% of 65	10% of 115	10% of 215
P=15%	15% of 2.5	15% of 65	15% of 115	15% of 215
P=20%	20% of 2.5	20% of 65	20% of 115	20% of 215
P=25%	25% of 2.5	25% of 65	25% of 115	25% of 215
P=30%	30% of 2.5	30% of 65	30% of 115	30% of 215
P=35%	35% of 2.5	35% of 65	35% of 115	35% of 215
P=40%	40% of 2.5	40% of 65	40% of 115	40% of 215
P=45%	45% of 2.5	45% of 65	45% of 115	45% of 215
P=50%	50% of 2.5	50% of 65	50% of 115	50% of 215
P=55%	55% of 2.5	55% of 65	55% of 115	55% of 215
P=60%	60% of 2.5	60% of 65	60% of 115	60% of 215
P=65%	65% of 2.5	65% of 65	65% of 115	65% of 215
P=70%	70% of 2.5	70% of 65	70% of 115	70% of 215
P=75%	75% of 2.5	75% of 65	75% of 115	75% of 215
P=80%	80% of 2.5	80% of 65	80% of 115	80% of 215
P=85%	85% of 2.5	85% of 65	85% of 115	85% of 215
P=90%	90% of 2.5	90% of 65	90% of 115	90% of 215
P=95%	95% of 2.5	95% of 65	95% of 115	95% of 215
P=100%	100% of 2.5	100% of 65	100% of 115	100% of 215

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 = 2.5	Y = 35	Y = 65	Y = 115	Y = 215
X=5	5 is what % of 2.5	5 is what % of 35	5 is what % of 65	5 is what % of 115	5 is what % of 215
X=10	10 is what % of 2.5	10 is what % of 35	10 is what % of 65	10 is what % of 115	10 is what % of 215
X=15	15 is what % of 2.5	15 is what % of 35	15 is what % of 65	15 is what % of 115	15 is what % of 215
X=20	20 is what % of 2.5	20 is what % of 35	20 is what % of 65	20 is what % of 115	20 is what % of 215
X=25	25 is what % of 2.5	25 is what % of 35	25 is what % of 65	25 is what % of 115	25 is what % of 215
X=30	30 is what % of 2.5	30 is what % of 35	30 is what % of 65	30 is what % of 115	30 is what % of 215
X=35	35 is what % of 2.5	35 is what % of 35	35 is what % of 65	35 is what % of 115	35 is what % of 215
X=40	40 is what % of 2.5	40 is what % of 35	40 is what % of 65	40 is what % of 115	40 is what % of 215
X=45	45 is what % of 2.5	45 is what % of 35	45 is what % of 65	45 is what % of 115	45 is what % of 215
X=50	50 is what % of 2.5	50 is what % of 35	50 is what % of 65	50 is what % of 115	50 is what % of 215
X=55	55 is what % of 2.5	55 is what % of 35	55 is what % of 65	55 is what % of 115	55 is what % of 215
X=60	60 is what % of 2.5	60 is what % of 35	60 is what % of 65	60 is what % of 115	60 is what % of 215
X=65	65 is what % of 2.5	65 is what % of 35	65 is what % of 65	65 is what % of 115	65 is what % of 215
X=70	70 is what % of 2.5	70 is what % of 35	70 is what % of 65	70 is what % of 115	70 is what % of 215
X=75	75 is what % of 2.5	75 is what % of 35	75 is what % of 65	75 is what % of 115	75 is what % of 215
X=80	80 is what % of 2.5	80 is what % of 35	80 is what % of 65	80 is what % of 115	80 is what % of 215
X=85	85 is what % of 2.5	85 is what % of 35	85 is what % of 65	85 is what % of 115	85 is what % of 215
X=90	90 is what % of 2.5	90 is what % of 35	90 is what % of 65	90 is what % of 115	90 is what % of 215
X=95	95 is what % of 2.5	95 is what % of 35	95 is what % of 65	95 is what % of 115	95 is what % of 215
X=100	100 is what % of 2.5	100 is what % of 35	100 is what % of 65	100 is what % of 115	100 is what % of 215

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 = 2.5	Y = 65	Y = 215	Y = 515	Y = 1015
X = 10	10 to 2.5	10 to 65	10 to 215	10 to 515	10 to 1015
X = 20	20 to 2.5	20 to 65	20 to 215	20 to 515	20 to 1015
X = 30	30 to 2.5	30 to 65	30 to 215	30 to 515	30 to 1015
X = 40	40 to 2.5	40 to 65	40 to 215	40 to 515	40 to 1015
X = 50	50 to 2.5	50 to 65	50 to 215	50 to 515	50 to 1015
X = 60	60 to 2.5	60 to 65	60 to 215	60 to 515	60 to 1015
X = 70	70 to 2.5	70 to 65	70 to 215	70 to 515	70 to 1015
X = 80	80 to 2.5	80 to 65	80 to 215	80 to 515	80 to 1015
X = 90	90 to 2.5	90 to 65	90 to 215	90 to 515	90 to 1015
X = 100	100 to 2.5	100 to 65	100 to 215	100 to 515	100 to 1015
X = 110	110 to 2.5	110 to 65	110 to 215	110 to 515	110 to 1015
X = 120	120 to 2.5	120 to 65	120 to 215	120 to 515	120 to 1015
X = 130	130 to 2.5	130 to 65	130 to 215	130 to 515	130 to 1015
X = 140	140 to 2.5	140 to 65	140 to 215	140 to 515	140 to 1015
X = 150	150 to 2.5	150 to 65	150 to 215	150 to 515	150 to 1015
X = 160	160 to 2.5	160 to 65	160 to 215	160 to 515	160 to 1015
X = 170	170 to 2.5	170 to 65	170 to 215	170 to 515	170 to 1015
X = 180	180 to 2.5	180 to 65	180 to 215	180 to 515	180 to 1015
X = 190	190 to 2.5	190 to 65	190 to 215	190 to 515	190 to 1015
X = 200	200 to 2.5	200 to 65	200 to 215	200 to 515	200 to 1015