70% is the most effective concentration to denature poteins so killing bacteria. At 95% the ethanol just evaporates and leaves the protein untouched. Below 70% does not denature proteins. It also makes the ethanol less flammable.
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Oh, dude, it's like making a weak cocktail. For every 1 part of 96% ethanol, you add about 1.29 parts of water to get it down to 70%. So, if you have like 100 ml of 96% ethanol, you mix in around 29 ml of water. Just don't mix it up with your actual drink, unless you want a real party in your stomach!
70 percent of 118 is 82.6
875 is 70 percent of 1250.
49/0.7 = 70 Therefore, the number that 49 is 70 percent of, is 70.
70/100 = 70%