One gram of a certain health food contains 7 percent of the minimum daily requirement of vitamin E and 3 percent of minimum daily requiremet of vitamin A. If vitamins E and A are to be obtained from no hter source, approximately how may grams of the grams of hte health food must be eaten daily to provide at least minimum daily requirement of both vitamins?

33.  问题是不少了一个条件, 每天的vitamin的需求量是多少?

这题不是很简单吗？100%/3%=33；因为维生素E的含量超过维生素A，所以要用维生素A的含量去做就OK。