How many ml of 0.95 medicinal alcohol is needed for 500ml of 0.75 disinfectant alcohol? How to configure?

Volume ratio of 95% alcohol to distilled water
75/（95-75）=15/4
The volume of 95% alcohol is 500 × 15 / 19 = 394.74 ml
The volume of distilled water required is 500 × 4 / 19 = 105.26 ml
That is to say, the alcohol and distilled water calculated above can be mixed and stirred evenly

Add 500 ml of 95% alcohol to water to make it a 75% alcohol solution. Add water approximately______ Ml

500 × 95% △ 75% - 500 = 63313-500 = 13313 (ML) a: 13313 ml of water is needed

How many grams of distilled water should be added to dilute 60 g of 95% alcohol to 75% disinfectant alcohol?

Suppose: to dilute 60 g of 95% alcohol to 75% disinfectant alcohol, x g distilled water should be added
60g*95%=(60g+x)*75%
x=16g
Therefore, to dilute 60 g 95% alcohol to 75% disinfectant alcohol, 16 g distilled water is needed

How many ml of 0.95 medicinal alcohol is needed for 500ml of 0.75 disinfectant alcohol? How to configure?