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First, you need to know four things: Formula
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hydration of your seed starter? 50%
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hydration of your final starter? 100%
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How much (%) of the total flour in your final starter comes from your seed starter? 25%
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How much (weight) final starter will you be making?100
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Second, calculate the total amount of flour and the total amount of water in your final starter.
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Flour (weight)50
'=B5*100/(100+B3)
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Water (weight)50
'=B5*B3/(100+B3)
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Third, calculate the amount of flour and the amount of water in the seed starter.
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Flour from seed starter12.5
'=B8*(B4/100)
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Weight of water in seed starter6.25
'=B12*(B2/100)
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Fourth, calculate the ingredients of your final starter. They will be:
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1. Seed starter18.75'=B12+B13
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2. Flour to be added37.5'=B8-B12
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3. Weight of water to be added43.75'=B9-B13
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Total weight of final starter100
'=SUM(B16:B18)
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