If you eat all that, and have done for a sustained period without doing any real exercise so to speak of, you will lose weight doing a good cardio session 3 times a week.

Same goes the other way round, if your weight is constant and you stick to your "normal" lifestyle, be it you exercise or not, you can cut your food intake by 10%, regardless of what it is you cut out, and you will lose weight.

Simple maths and common sense really.