@giantgem,
Cutting calories without exercising its not easy but you can do by controling your food means do diat.The easiest way to keep yourself healthy on a low calorie diet is to learn to love vegetables becouse vegetables containing less calories than meat and chicken,Use fruit as dessert,Low calories sugar in sweet dishes.
If you are non vegetarian Choose low fat proteins,Avoid processed foods.Above these all Exercising will help even more.