In FractionCalc, you can calculate fractions up to 4 fractions with different values.
Here, you can calculate default fraction or mixed fractions. To calculate the basic, default fractions (like 1/2), just let the "whole" input empty, as it an input for mixed fractions (like 1 1/2)
Also, you can enable "Show Explanations" from Options in the Ribbon, so you actually know and learning fractions. not just calculate it and call it a day.
Take a look:
Notes: Show Explanation feature only available on this mode only.