# Add Percentage Calculator

Use this percentage plus calculator to add percentage or increase number by a percentage. It is especially use for calculating VAT-inclusive/ VAT-excluded price, cost markup price and gratuity-tip amount.

See also: Decrease 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