My Percentage Calculator

A simple percentage calculator that calculates percents and percentages with 3 main functions:
1. Show result from a percentage from a given number.
2. See a given number is what percentage from another number.
3. See the percentage difference from two given numbers.
This is a simple app to help you with your daily math problems.
It can also be used to calculate a tip in a restaurant.
"In mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%", or the abbreviations "pct.", "pct"; sometimes the abbreviation "pc" is also used. A percentage is a dimensionless number (pure number)."
-Wikipedia