Percentage Calculator is simply the best and easiest to use app which calculates:

- simple percentage calculator (5 percent of 40 is 2)
- percentage increase/decrease (5 percent decrease from 40 is 38)
- tip calculator
- discount calculator
- convert fractions to percentages (5 / 20 is the same as 25 percent)
- markup
- profit margin
- VAT
- Sales tax
- loan payment
- cumulative growth

Percentage calculator is useful in many real-life situations:
- school (mathematics, statistics, algebra)
- business and finance (markup, profit margin, profit, loan payments, cumulative growth, inflation, doubling time, investment return rate, loan interest rate, markup, profit margin, company profits changes)
- shopping (discounts, comparison of two products that differ in quantity)
- tipping
- cooking (ingredients are often shown in percentages)
- health (body mass index, fat percentage in food)