Question

A recipe for apple cake needs 10 mL of baking powder, 70 mL of butter, 190 mL of sugar and 420 mL of flour. This is enough to make a cake for 8 people. How much of each ingredient would be needed to make a cake for 20 people?

Answer 1

20/8 = 2.5

multiply all the ingredients by 2.5

10 ml  * 2.5 = 25 ml of baking powder

70 *2.5 = 175 ml of butter

190 * 2.5 = 475 ml of sugar

420 * 2.5 = 1050 ml of flour