You are served dessert at a restaurant. You want to know what $\%$ of the calories in the dessert are from fat. The menu states that there are $10$ grams of fat, $30$ grams of carbohydrates and $4$ grams of protein in the dessert. You know that the number of calories per gram is roughly the same for both protein and carbohydrates. What percentage of calories comes from fat for your dessert?