Comment by jacorreia

It's literally just calories in vs. calories out. If 400 calories/day meets your weight loss goals, all you have to do is make sure that the calories you expend + the calories you no longer intake = 400. The ratio of those two factors completely varies from person to person on what their motivation levels are going to be, but as long as it works for you it will result in the same amount of weight loss as any other ratio