How do you dilute from ethanol 96 percent to 70 percent?

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!