The percentage calculator is a free and easy to use app that will make your calculations much simpler.
There are 4 different percentage calculations you can perform and those are value change increase decrease conversion and growth with hopefully more to come in the future.
Value calculates how much x% of y is for example 25% of 40 is 10.
Change calculates how much y changes if x% is added/subtracted from it for example 50 + 20% = 60
With the conversion you can convert fractions into percentages for example 1/5=20%
Growth is similar to change however it's not a one time change but a change over many periods. For example if you set 20 to change by +50% over 3 periods the calculation will go like this 20+50%=30; 30+50%=45%; 45+50%=675; with the final result being 675.
The lock feature- you can lock one of the 3 or 4 fields which will be the one that is calculated. This means you can do reverse calculations. For example if $10 is 25% of the price the full price is $40.