Seven percent milk fat doesn’t tell you how many grams of fat is in 1 ounce of this cheese. So 7% of 1 ounce is 2.1 grams of fat in 1 ounce.
Whole milk is 5% milk fat, but this doesn’t mean that 5% of the calories in whole milk are fat. It means 5% by gram weight is fat not calories. One percent milk has 2.5 grams of fat in 1 cup that weighs 237 grams. Those same 2.5 grams of fat though equals 20% of the calories found in 1 cup of 1% milk.
If the cheese you bought is labeled skim milk cheddar cheese, it should be made with skim milk. It doesn’t sound like you have an ingredient listing to check that out. So how did you learn it was rated at 7% milk fat? I would suggest next time you are at the store where you purchased the cheese to ask them if they have nutritional information or a label you can have.
All food sold in the US is required to have a Nutrition Facts food label. If you purchased this cheese from a delicatessen in a store, it may not be labeled though.