Is takes 1 1/2 cups of flour to make 12 cupcakes, how much flour do i need if i'm making 40 cupcakes?

First calculate how many cups do you need for only 1 cupcake by dividing number of cups for 12 cupcakes with 12 cupcakes

1 × 1/2 ÷ 12 = 1/8 (that is how much you need for one cupcake)

Now multiply that number 1/8 with 40 and you'll get your result

1/8 × 40 = 5

you'll need 5 cups for 40 cupcakes.

Amount of flour Number of cupcakes
1 1/2 cups 12
X cups 40

Now cross multiply
12 X = 40 × 1 1/2
12 X = 60
X = 60/12
X = 5
Therefore, the no.of cups of floor needed = 5 cups of floor