Percentage Calculator by MES

Percentage Calculator is the Android version of the very popular web application https://percentagecalculator.mes.fm made by Math Easy Solutions.

Users can see the formulas for each calculation (in real time) by clicking the '?' button beside each calculation.
Users can also create multiple copies of the same calculation by clicking the '+' button beside each calculation.

Any features you would like to be added? Feel free to leave a review!