数学题怎么都读不懂==
以下这道题就是读不懂了.
For food products to be labeled"light," the U.S.Food and Drug Administration requires that the altered product must either contain one-third or fewer calories than the regular product or it must contain one-half or less fat than the regular product.If a serving of Miracle Whip?Light contains 20 calories and 1.5 grams of fat,then what must be true about either the number of calories or the grams of fat in a serving of regular Miracle Whip?