To dilute 95% alcohol to 75% alcohol, the amount of distilled water needs to be determined by calculation. Calculated according to 500ml, 95% alcohol is 500ml, of which alcohol accounts for 500×95%=475, 475ml of alcohol is diluted to 75%, the required amount of water is x, then 475÷(475+x)=75% , Find x = 158 ml, and then subtract 158 ml of water by 25 is the amount of water you need to add, that is, add 123 ml of distilled water, and then mix well.

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