My last meal prep used over six pounds of bone-in, skin-on chicken thighs and nearly three pounds of veggies. It ended up getting over 60% of the calories from fat. Just imagine if I had used a fattier meat or added a lot of cheese and butter to it. 
My favorite sausages, Farmer John Hot Links, get nearly 80% of their calories from fat.
Since I’m trying to restrict calories, I had to reduce my intake of some of my favorite foods, because they’re too high in fat (and calories) – bacon, sausage, cheese, butter.
I used to joke that I could turn a 60-calories veggie side dish into a 700-calorie one by adding “just a little” butter and cheese. I imagine that would have over 90% of its calories coming from fat.
70% fat? Easy peasy.
However, percentages are pretty meaningless. Your macro goals should be stated in grams. The fat macro is not a goal that has to be reached. Protein is the only hard limit that you should be at or above. For carbs and fats, the lower the better (especially if you’re trying to lose weight). You should be eating more fat if you’re hungry. But if you’re not hungry, there’s no reason to eat more fat.