Fairly "easy" with some discipline (whom am I kidding - it's tough as sh*t). As an example - I was on 98kg (1.76m) last year and went on a low kJ died (so in essence going into ketosis). I dropped carbs to 10g/day and kJ intake to 3000kj/day (this is tough). But it is doable as you can easily get away with cheese, bacon, skinless chicken, red meat, fish (be selective, salmon has too much kJ) and drink a ton of water (at least 3L per day). Make sure that you get into ketosis (you can buy strips to measure it via your urine) and then have it run for 3weeks and then up it to 20g and 3500kJ/day and another 3 weeks and then leave it at 30g per day.
Your food-choices based on daily carbs and kJ will limit you quite a lot - you actually will not be able to have any vegetables except mushrooms (I enjoyed those). In the initial weeks I dropped up to 3kg per week and in 3 months 21kg where gone. This did involve 30 minutes of running per day (was moderate exercise). You can enjoy cool drinks such as Sprite Zero or Tab - avoid anything with high caffeine content. I also dropped my coffee-intake to two cups per day (with 2 sachets of canderel per coffee) and cream instead of milk.
Oh - and forget all the condiments - such as sauces and bread and chocolate. It's really a daily focused exercise, but I am glad that almost a year after I am still on 77kg and have never felt better (nice to drop from a size 40 pant to a size 32 and from an XXL to a M).