You can also calculate the cost of driving from Cincinnati, OH to Detroit, MI based on current local fuel prices and an estimate of your car's best gas mileage. If you're meeting a friend, you might be interested in finding the city that is halfway between Cincinnati, OH and Detroit, MI.
Cocoa beans contain caffeine, so the higher the percentage of cocoa in a chocolate bar, the higher its caffeine content. Likewise for coffee: Ounce for ounce, the more diluted the coffee drink, the less caffeine.
In the US, there is not specific minimum cacao percentage for dark chocolate. Cacao percentage refers to the amount of cocoa solids in a product. Cocoa solids are all of the ingredients from a cocoa bean, including cocoa powder, cocoa butter, chocolate liquor.