Do the numbers 85/15 on a package of ground round mean anything to you? If you think it describes the percentage of the meat that is lean (85) and the percentage that is fat (15), you’re right. But here’s the catch: the numbers refer to the percent lean and fat based on weight, not calories. A 4-ounce portion of ground round contains 240 calories and 17 grams of fat. At nine calories per gram, that’s 153 calories from fat, about 64 percent. Look to the Nutrition Facts panel for detailed nutrition information.