math
posted by Anonymous .
A reduced fat cookie contains 2g of fat per serving. In order for food to be termed 'reduce fat', it must have at least 20% less fat than the regular item

This question is incomplete.
The regular item would have had 1/0.8 or 1.25 times as much fat. That would be 2.5 g of fat.
2.0 is 20% less than 2.5.
I assume that is what they want to know