I have 2 ways 2 solve this THE ANWSER IS 210 Well, if 150 grams is used for 5 cakes, we can divide that. 150/5=30. 30 grams of sugar are used for each cake You want to know how many grams for 7 cakes 30x7=<u><em>210 grams of sugar are used for seven cakes. </em></u><span>Hope this helps! and ... </span>