Answer:
40
Step-by-step explanation:
The bread is 90.
28% is cookie
Then 72 %is bread and cake
Sum of bread and cake is 360
1%is 5 so cookie is 140
If sell 40 bread. Bread left is 50. Cake left is 150
Then cookie must be left 100 because the ratio of the no 1 is =to 50
Then need to sell 40 cookie so the ratio will be
50:150:100= 1:3:2