# Percentage Add Calculator

Use this percentage plus calculator to quickly add percentage or increase number a by a percentage.

See also: Decrease a number by a percentage

#### Percentage Addition Formula

We simply multiply the number with (1+percentage) to increase it by that many percent:-

**Percent-added value** = N ×(1+p/100);

Where,

p is the percentage to be added to number N

#### Uses

The same calculation is used for calculating price of a product including the sales tax, cost markup price and gratuity-tip amount.

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