Answer:

Step-by-step explanation:

42, because 50% or 1/2 of 28 is 14. Increasing it would be addinng it to the original number so 28+12=42
90 grams are equivalent to 0.09 kilograms and 55 grams are equivalent to 0.055.
So 0.09 + 0.055 = 0.145.
0.145 * 12 = 1.74
So 1.74 kilograms of sugar is needed to make 12 crisps.
The answer is 3. Hope it helps