Add 5% water
You mix the pure alcohol with something else, for example, water.
40% off 95 = 95 - (0.40 x 95) = 57
95 ml of ethyl alcohol to 5 ml of water
It is available in 190 proof (95% alcohol) and 151 proof (75.5% alcohol) varieties.
To prepare 1000 ml of 70% alcohol solution, you would need to mix 700 ml of 95% alcohol with 300 ml of water. Starting with a base of 95% alcohol ensures that the final solution will be at least 70% alcohol.
$9.50
Since 55% of 95 is 52.25, 55% off 95 equals 95 - 52.25, which = 42.75
95% means 95ml of every 100 is alcohol. So the answer is 228ml (take away 1/20, i.e. 12ml)
5 percent off leaves 95 percent on.0.95 x 203 = 192.85
684 ml
5% off means 95% of 1200.00 = 1200.00*95/100 = 1140.00