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 = 2.7	X = 67	X = 117	X = 217
P=5%	5% of 2.7	5% of 67	5% of 117	5% of 217
P=10%	10% of 2.7	10% of 67	10% of 117	10% of 217
P=15%	15% of 2.7	15% of 67	15% of 117	15% of 217
P=20%	20% of 2.7	20% of 67	20% of 117	20% of 217
P=25%	25% of 2.7	25% of 67	25% of 117	25% of 217
P=30%	30% of 2.7	30% of 67	30% of 117	30% of 217
P=35%	35% of 2.7	35% of 67	35% of 117	35% of 217
P=40%	40% of 2.7	40% of 67	40% of 117	40% of 217
P=45%	45% of 2.7	45% of 67	45% of 117	45% of 217
P=50%	50% of 2.7	50% of 67	50% of 117	50% of 217
P=55%	55% of 2.7	55% of 67	55% of 117	55% of 217
P=60%	60% of 2.7	60% of 67	60% of 117	60% of 217
P=65%	65% of 2.7	65% of 67	65% of 117	65% of 217
P=70%	70% of 2.7	70% of 67	70% of 117	70% of 217
P=75%	75% of 2.7	75% of 67	75% of 117	75% of 217
P=80%	80% of 2.7	80% of 67	80% of 117	80% of 217
P=85%	85% of 2.7	85% of 67	85% of 117	85% of 217
P=90%	90% of 2.7	90% of 67	90% of 117	90% of 217
P=95%	95% of 2.7	95% of 67	95% of 117	95% of 217
P=100%	100% of 2.7	100% of 67	100% of 117	100% 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=5	5 is what % of 2.7	5 is what % of 37	5 is what % of 67	5 is what % of 117	5 is what % of 217
X=10	10 is what % of 2.7	10 is what % of 37	10 is what % of 67	10 is what % of 117	10 is what % of 217
X=15	15 is what % of 2.7	15 is what % of 37	15 is what % of 67	15 is what % of 117	15 is what % of 217
X=20	20 is what % of 2.7	20 is what % of 37	20 is what % of 67	20 is what % of 117	20 is what % of 217
X=25	25 is what % of 2.7	25 is what % of 37	25 is what % of 67	25 is what % of 117	25 is what % of 217
X=30	30 is what % of 2.7	30 is what % of 37	30 is what % of 67	30 is what % of 117	30 is what % of 217
X=35	35 is what % of 2.7	35 is what % of 37	35 is what % of 67	35 is what % of 117	35 is what % of 217
X=40	40 is what % of 2.7	40 is what % of 37	40 is what % of 67	40 is what % of 117	40 is what % of 217
X=45	45 is what % of 2.7	45 is what % of 37	45 is what % of 67	45 is what % of 117	45 is what % of 217
X=50	50 is what % of 2.7	50 is what % of 37	50 is what % of 67	50 is what % of 117	50 is what % of 217
X=55	55 is what % of 2.7	55 is what % of 37	55 is what % of 67	55 is what % of 117	55 is what % of 217
X=60	60 is what % of 2.7	60 is what % of 37	60 is what % of 67	60 is what % of 117	60 is what % of 217
X=65	65 is what % of 2.7	65 is what % of 37	65 is what % of 67	65 is what % of 117	65 is what % of 217
X=70	70 is what % of 2.7	70 is what % of 37	70 is what % of 67	70 is what % of 117	70 is what % of 217
X=75	75 is what % of 2.7	75 is what % of 37	75 is what % of 67	75 is what % of 117	75 is what % of 217
X=80	80 is what % of 2.7	80 is what % of 37	80 is what % of 67	80 is what % of 117	80 is what % of 217
X=85	85 is what % of 2.7	85 is what % of 37	85 is what % of 67	85 is what % of 117	85 is what % of 217
X=90	90 is what % of 2.7	90 is what % of 37	90 is what % of 67	90 is what % of 117	90 is what % of 217
X=95	95 is what % of 2.7	95 is what % of 37	95 is what % of 67	95 is what % of 117	95 is what % of 217
X=100	100 is what % of 2.7	100 is what % of 37	100 is what % of 67	100 is what % of 117	100 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 = 10	10 to 2.7	10 to 67	10 to 217	10 to 517	10 to 1017
X = 20	20 to 2.7	20 to 67	20 to 217	20 to 517	20 to 1017
X = 30	30 to 2.7	30 to 67	30 to 217	30 to 517	30 to 1017
X = 40	40 to 2.7	40 to 67	40 to 217	40 to 517	40 to 1017
X = 50	50 to 2.7	50 to 67	50 to 217	50 to 517	50 to 1017
X = 60	60 to 2.7	60 to 67	60 to 217	60 to 517	60 to 1017
X = 70	70 to 2.7	70 to 67	70 to 217	70 to 517	70 to 1017
X = 80	80 to 2.7	80 to 67	80 to 217	80 to 517	80 to 1017
X = 90	90 to 2.7	90 to 67	90 to 217	90 to 517	90 to 1017
X = 100	100 to 2.7	100 to 67	100 to 217	100 to 517	100 to 1017
X = 110	110 to 2.7	110 to 67	110 to 217	110 to 517	110 to 1017
X = 120	120 to 2.7	120 to 67	120 to 217	120 to 517	120 to 1017
X = 130	130 to 2.7	130 to 67	130 to 217	130 to 517	130 to 1017
X = 140	140 to 2.7	140 to 67	140 to 217	140 to 517	140 to 1017
X = 150	150 to 2.7	150 to 67	150 to 217	150 to 517	150 to 1017
X = 160	160 to 2.7	160 to 67	160 to 217	160 to 517	160 to 1017
X = 170	170 to 2.7	170 to 67	170 to 217	170 to 517	170 to 1017
X = 180	180 to 2.7	180 to 67	180 to 217	180 to 517	180 to 1017
X = 190	190 to 2.7	190 to 67	190 to 217	190 to 517	190 to 1017
X = 200	200 to 2.7	200 to 67	200 to 217	200 to 517	200 to 1017