Math question

I made a friend 45 ml liquid at 15mg nic. He probably has about 40ml left. He says its too strong. If I make more without nic how many mls would he need to add to bring it down to 12mg nic. (approx). Not sure how to calculate that. Anyone?

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15mg to 12mg nic is a 20% nic reduction. 40ml x .20 = 8 mls

You can achieve a 12mg nic mix by adding 8mls of no nic eliquid

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Thank you!!

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