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 = 3.3	X = 73	X = 123	X = 223
P=5%	5% of 3.3	5% of 73	5% of 123	5% of 223
P=10%	10% of 3.3	10% of 73	10% of 123	10% of 223
P=15%	15% of 3.3	15% of 73	15% of 123	15% of 223
P=20%	20% of 3.3	20% of 73	20% of 123	20% of 223
P=25%	25% of 3.3	25% of 73	25% of 123	25% of 223
P=30%	30% of 3.3	30% of 73	30% of 123	30% of 223
P=35%	35% of 3.3	35% of 73	35% of 123	35% of 223
P=40%	40% of 3.3	40% of 73	40% of 123	40% of 223
P=45%	45% of 3.3	45% of 73	45% of 123	45% of 223
P=50%	50% of 3.3	50% of 73	50% of 123	50% of 223
P=55%	55% of 3.3	55% of 73	55% of 123	55% of 223
P=60%	60% of 3.3	60% of 73	60% of 123	60% of 223
P=65%	65% of 3.3	65% of 73	65% of 123	65% of 223
P=70%	70% of 3.3	70% of 73	70% of 123	70% of 223
P=75%	75% of 3.3	75% of 73	75% of 123	75% of 223
P=80%	80% of 3.3	80% of 73	80% of 123	80% of 223
P=85%	85% of 3.3	85% of 73	85% of 123	85% of 223
P=90%	90% of 3.3	90% of 73	90% of 123	90% of 223
P=95%	95% of 3.3	95% of 73	95% of 123	95% of 223
P=100%	100% of 3.3	100% of 73	100% of 123	100% of 223

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 = 3.3	Y = 43	Y = 73	Y = 123	Y = 223
X=5	5 is what % of 3.3	5 is what % of 43	5 is what % of 73	5 is what % of 123	5 is what % of 223
X=10	10 is what % of 3.3	10 is what % of 43	10 is what % of 73	10 is what % of 123	10 is what % of 223
X=15	15 is what % of 3.3	15 is what % of 43	15 is what % of 73	15 is what % of 123	15 is what % of 223
X=20	20 is what % of 3.3	20 is what % of 43	20 is what % of 73	20 is what % of 123	20 is what % of 223
X=25	25 is what % of 3.3	25 is what % of 43	25 is what % of 73	25 is what % of 123	25 is what % of 223
X=30	30 is what % of 3.3	30 is what % of 43	30 is what % of 73	30 is what % of 123	30 is what % of 223
X=35	35 is what % of 3.3	35 is what % of 43	35 is what % of 73	35 is what % of 123	35 is what % of 223
X=40	40 is what % of 3.3	40 is what % of 43	40 is what % of 73	40 is what % of 123	40 is what % of 223
X=45	45 is what % of 3.3	45 is what % of 43	45 is what % of 73	45 is what % of 123	45 is what % of 223
X=50	50 is what % of 3.3	50 is what % of 43	50 is what % of 73	50 is what % of 123	50 is what % of 223
X=55	55 is what % of 3.3	55 is what % of 43	55 is what % of 73	55 is what % of 123	55 is what % of 223
X=60	60 is what % of 3.3	60 is what % of 43	60 is what % of 73	60 is what % of 123	60 is what % of 223
X=65	65 is what % of 3.3	65 is what % of 43	65 is what % of 73	65 is what % of 123	65 is what % of 223
X=70	70 is what % of 3.3	70 is what % of 43	70 is what % of 73	70 is what % of 123	70 is what % of 223
X=75	75 is what % of 3.3	75 is what % of 43	75 is what % of 73	75 is what % of 123	75 is what % of 223
X=80	80 is what % of 3.3	80 is what % of 43	80 is what % of 73	80 is what % of 123	80 is what % of 223
X=85	85 is what % of 3.3	85 is what % of 43	85 is what % of 73	85 is what % of 123	85 is what % of 223
X=90	90 is what % of 3.3	90 is what % of 43	90 is what % of 73	90 is what % of 123	90 is what % of 223
X=95	95 is what % of 3.3	95 is what % of 43	95 is what % of 73	95 is what % of 123	95 is what % of 223
X=100	100 is what % of 3.3	100 is what % of 43	100 is what % of 73	100 is what % of 123	100 is what % of 223

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 = 3.3	Y = 73	Y = 223	Y = 523	Y = 1023
X = 10	10 to 3.3	10 to 73	10 to 223	10 to 523	10 to 1023
X = 20	20 to 3.3	20 to 73	20 to 223	20 to 523	20 to 1023
X = 30	30 to 3.3	30 to 73	30 to 223	30 to 523	30 to 1023
X = 40	40 to 3.3	40 to 73	40 to 223	40 to 523	40 to 1023
X = 50	50 to 3.3	50 to 73	50 to 223	50 to 523	50 to 1023
X = 60	60 to 3.3	60 to 73	60 to 223	60 to 523	60 to 1023
X = 70	70 to 3.3	70 to 73	70 to 223	70 to 523	70 to 1023
X = 80	80 to 3.3	80 to 73	80 to 223	80 to 523	80 to 1023
X = 90	90 to 3.3	90 to 73	90 to 223	90 to 523	90 to 1023
X = 100	100 to 3.3	100 to 73	100 to 223	100 to 523	100 to 1023
X = 110	110 to 3.3	110 to 73	110 to 223	110 to 523	110 to 1023
X = 120	120 to 3.3	120 to 73	120 to 223	120 to 523	120 to 1023
X = 130	130 to 3.3	130 to 73	130 to 223	130 to 523	130 to 1023
X = 140	140 to 3.3	140 to 73	140 to 223	140 to 523	140 to 1023
X = 150	150 to 3.3	150 to 73	150 to 223	150 to 523	150 to 1023
X = 160	160 to 3.3	160 to 73	160 to 223	160 to 523	160 to 1023
X = 170	170 to 3.3	170 to 73	170 to 223	170 to 523	170 to 1023
X = 180	180 to 3.3	180 to 73	180 to 223	180 to 523	180 to 1023
X = 190	190 to 3.3	190 to 73	190 to 223	190 to 523	190 to 1023
X = 200	200 to 3.3	200 to 73	200 to 223	200 to 523	200 to 1023