Mary has decided to bake oatmeal cookies for her daughter's birthday. The recipe calls for 3/4 cups of sugar and it makes 20 cookies.
=> 3/4 sugar : 20 cookies
There will be 40 guests.
Lets find out how much sugar will he needs.
=> 3/4 = 3/4 = 6/4 or 1 and 1/2