Volumes for stepping up starters

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scone

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I was curious what the accepted practice was for stepping up starters.

Jamil recommends pitching one vial (~100 billion cells) into a 2 liter starter to double the population to around 200 billion, which is about what you want for a typical ale.

If I want to split a vial of yeast between two batches, am I correct in assuming that I should pitch half (~50 billion cells) into a 1 liter starter to double it, and then add another liter of wort to bring to to the 200 billion required? Would this work?
 
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