Additive/alcohol mixture calculator

I found a mixture calculator for blending oil and nitro into nitro gas for r/c fuels. This should work for additive/alcohol mixtures too. It uses percents so you just tell it what percent you have now, and what percent you want to end up with and it'll give you the exact amount to add to your mixture in oz. It doesn't matter what you substitute nitro or oil for. Here's the link.

http://www.nitrorc.com/fuelws/allmix.asp