MMS at 98 % Strength

Hello. I need some help! I am able to get MMS / ACTIVATOR from a chemical store nearby both at 98 % strength.
How do I calculate to get the percent- 28%/ 50 % as recommended by Jim Humble. they stuff in powdered. I will appreciate any guidance. Thanks

Steve

Steve, we need to know exactly what is available at the chemical store. Is the "MMS" a sodium chlorite solution or sodium chlorite powder/flakes?

Citric acid is usually in crystal form, but I have never heard of 98% citric acid.