Answer:
One needs 3.02 portions of kiri cheese to equal 50 g
Explanation:
If there is 278 calories for every 100 g of the cheese, then 50 g of the cheese would contain half of that amount of calories, that is: in 50 g of kiri cheese, there is 278/2 = 139 calories.
since each portion has 46 calories, then to reach to 139 calories (which is 50 g of the cheese) one needs 139/46 = 3.02 portions