To calculate the grams of unsaturated crisps, first find the total grams of fat:
Total fat = 35% of 250g
Total fat = 0.35 * 250g
Then, calculate the grams of unsaturated fat:
Unsaturated fat = 2/3 of total fat
Unsaturated fat = (2/3) * Total fat
Now you have the grams of unsaturated crisps, which is equal to the grams of unsaturated fat.