Question

If 150g of sugar is used for 5 cakes how much is used for 7

Answer 1

150 grams is used for 5 cakes divide that.
150/5=30. 30 grams of sugar are used for each cake
 for 7 cakes
30x7=210 grams of sugar are used for seven cakes.

Answer 2

210 is the answer.  First you divide 150 by 5 and you get 30. Multiply 30 by 7n and you get your answer