The ratio of sugar to flour in a cake recipe is 3 to 5. Marcus is going to follow the recipe to make a large
sheetcake. He starts by putting 12 cups of sugar in a mixing
bowl. How many cups of flour should he add?

He would need to add 20 cups of flour.

According to the problem Marcus puts in twelve cups of sugar, and the original amount of sugar was 3 cups. If you divide 12 by 3 you get 4. This means that you multiply 5 by 4 to get the total amount of flour required (originally there were 5 cups of flour).

Hope this helps and have a nice day.

-R3TR0 Z3R0

step-by-step explanation: you take each of the numbers and divide by the amount then you take the range