Macros Ratio

For weight loss it doesn't matter. For health and body composition it depends on your goals.
If your lifting weights and want to retain as much muscle mass as possible while cutting (so that you end up with the toned look) you want to get enough protein. Shoot for .8-1 grams per pound of lean body mass (weight-(weight x body fat %)).
For hormonal health, brain function, vitamin absorption, joint health and more, you want to get enough fat. The recommended guidelines are 20-30% of calories from fat. Since your number of calories could vary based on whether your trying to lose, gain or maintain weight, I find it better to base intake on bodyweight (so about .35-.42 grams per pound of lean bodyweight). Try to aim for most of your fat being unsaturated.
Carbs then would fill in the rest of your available calories.

So...
.8 grams of protein x lean bodyweight x 4 calories per gram = calories from protein

.4 grams of fat x lean bodyweight x 9 calories per gram = calories from fat

Calorie goal - calories from fat and protein = calories from carbs

Calories from carbs / 4 calories per gram = grams of carbs

ETA and try to get 20-40 grams of fiber each day

Stomach weight? - Too many carbs! Keep carbs under 100 grms/day.