Remark You only need to set up a direct proportion
Givens flour for 12 cakes = 150 grams Number of cakes initially = 12 Amount of flouer for 30 cakes = x Number of cakes = 30
Proportion amount flour for 12 cakes / 12 cakes = x / 30
Sub and solve 150 grams / 12 cakes = x / 30 cakes Cross multiply 150 * 30 = 12 *x Multiply the left side. 4500 = 12 x Divide both sides by 12 4500/12 = x 375 grams for 30 cakes. <<<<< Answer