Do check your body fat % as well. That will gives you a better indication how much body fat % you'll need to lose.

Also I would like to congrate you in regards of losing from 99kg to 75kg which is no easy feat.

* Please note that body fat is always lighter than muscle or bones.

There are a lot of methods to check for body fat BUT I find this two most avaliable.

1. Calipers (I think some one is bulking it, PM Canopies)
2. Those machines in fitness centre (ie. Fitness First or California Fitness) which transmit a small electric charge towards your body.

Personally, I'll use no. 2 because I have no idea how to use a calipers save for pinching my fat with my fingers.

Cheers