I used to know how to do this, but having not needed to do so for a long time, I have forgotten the process.

I have 1355 grams of a solution containing 20% 2-Butoxyethanol. I need to raise the percentage of 2-Butoxyethanol to 25%. How much 100% 2-Butoxyethanol do I need to add? Total weight after addition is irrelevant.

I have 1355 grams of a solution containing 20% 2-Butoxyethanol. I need to raise the percentage of 2-Butoxyethanol to 25%. How much 100% 2-Butoxyethanol do I need to add? Total weight after addition is irrelevant.

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