The human body can get energy by metabolizing proteins, carbohydrates or fatty acids, depending on the circumstances. Roughly speaking, the energy it gets comes mostly from allowing all the carbon atoms in the food molecules to become oxidized to carbon dioxide (CO2) ? by reaction with oxygen from the atmosphere. Hence the energy content of food is roughly proportional to the carbon content. Let's consider valine (C5H11NO2), one of the amino acids from which proteins are made, and fructose (C6H12O6), one of the simplest carbohydrates. Using the idea above about energy content, calculate the ratio of the energy the body gets metabolizing each gram of valine to the energy the body gets metabolizing each gram of fructose. Round your answer to the correct number of significant digits