# Percentage Calculator

Have trouble calculating percentages? Our service helps you save time by calculating the values you put in the input boxes. You’ll get the required answer for free in no time!

## How it works

This percentage calculator tool is simple and quick to provide the correct answers. Please type any two values in the empty fields and click ‘Calculate’ to get the required value.

For instance, if you want to increase 12 by 50%, you can enter ’12’ by ‘50’ percent and click the calculate button to get the answer 18%. You can also copy your results by selecting the option next to your answer tab.

Learn more about the different types of percentages below. Click on the formula you are interested in.

### What is n percent of a?

x = a/100 × n

For instance,
80% of 5 oranges are ripe? How many oranges are ripe?

• If n is 80% and a is 5 then find x
• You can find out by dividing 5 / 100 = 0.05
• Now multiply it with 80. 0.05 × 80 = 4
• So, the answer is 4 oranges, or you can say 80% of 5 is 4.

You can find your answer this way or use our percentage calculator to get accurate results and save time

### a is what percent of b?

x = a/b × 100

For instance,
A runner is doing a workout, his goal is to run 10 km. He has completed 6 km. Write in percentage how many km he has completed.

• If a is 6 and b is 10, find x
• You can simply divide 6 / 10 = 0.6
• Now multiply it with 100 = 0.6 × 100 = 60%
• So, the runner has completed 60% of his workout.

This formula can help calculate the percentage value of two different values. You can easily find out the answer via our percentage calculator.

### What is the percentage increase/decrease from a to b?

x = (b - a)/a × 100

For instance,
In 2018, the gas price changed from \$3.24 to \$3.50. Calculate the % of change in the price of gas in 2018.

• If a is 3.24 and b is 3.50, then find x
• Start by subtracting 3.50 from 3.24. You’ll get 3.50 - 3.24 = 0.26
• Divide 0.26 by 3.24. You’ll get 0.26 / 3.24 = 0.08
• Now multiply the answer by 100. You'll get the answer 0.08 × 100 = 8%
• So, the percentage change from 3.24 to 3.50 is 8% which shows an overall increase in gas price in 2018.

A percentage increase or decrease compares the relationship between two values, i.e., from a to b, and reveals their differences. Hence, the positive sign shows an increase, while the negative sign shows a decrease in the overall percentage between the two values.

### a is n percent of what?

x = (a × 100)/n

For instance,
There are 8 drum players in a high school band. 60% of the band play the drum, find out the total number of band members in the band?

• If a is 8 and n is 60%, then find the unknown number x
• Multiply 8 by 100. You’ll get 8 × 100 = 800
• Now divide 800 by 60. The answer is 800 / 60 = 13
• So, there are 13 band members, or you can say 8 is 60% of 13.

Using this percentage formula, you can solve equations like these quickly or calculate for free using our percentage calculator.

### Increase a by n percent.

x = a × (100 + n)/100

For instance,
Last week, the supply of 80kg of rice increased by 23%. So, what's the increased supply now?

• If a is 80 and n is 23% then find x
• Add 100 by 23, you’ll get 100 + 23 = 123
• Divide 123 by 100 and multiply by 80, the answer is 123 / 100 = 1.23 × 80 = 98.4
• So, 80 kg by 23% is 98.4 kg, which shows an increase in the supply value.

For percentage increase, you can also add the decimal to 1, for instance, 23% = 0.23 + 1 =  1.23, and multiply it by 80 to get the same answer.

### Decrease a by n percent.

x = a × (100 - n)/100

For instance,
The price of goods worth \$80 suddenly fell by 23%. So, what's the value after discount?

• If a is 80 and n is 23% then find x
• Subtract 100 by 23. You’ll get 100 - 23 = 77
• Divide 77 by 100 and multiply by 80, the answer is 77 / 100 = 0.77 × 80 = 61.6
• So, \$80 worth of goods fallen by 23% is worth \$61.6, which shows a decrease in the value.

For percentage decrease, you can also subtract the decimal from 1, for instance, 23% =  1 - 0.23 = 0.77, and multiply it by 80 to get the same answer.