What is 12/12 in simplest form

in simplest form would be simply, 1
~Because 12 can go into 12  one time. 
-Hope this helped :)

From 100ml to 250ml is an increase by a factor of 2.5. since the amount of fat is directly proportional to the total amount, the amount of fat should increase by a factor of 2.5 as well. therefore:
(1.8)(2.5) = 4.5

let me know if you have any questions!!!