I've tried fasting, low calorie (300-500) medium cal(800-1000) and high cal (1000-1200) without exercise as well as all of those 3 with exercise at one point in my life. You lose the most with exercise, even when fasting/low calorie the weight will not move as much without exercise. So I'd advice you to try long walks and maybe jogging if you want visible results. Even with the same net calorie amount I always lost more when incorporating exercise into my diet.
Not advising you to eat that number of calories by the way. I'm just using myself as an example to show even when you go the extremes, exercise allows for more weight loss.