Cut - 10-13 cals per lb of bodyweight
Once you know how many cals you need to start cutting, now you can figure out your P/C/F ratio. Some of these ratios of Protein/Carbs/Fat many have successfully used are: 40/40/20, 50/20/30 or Isocaloric 33/33/33 to name a few.
Each Gram of Protein = 4 cals
Each Gram of Carbs = 4 cals
Each Gram of Fat = 9 cals
To figure this out is alot more simple than you think. For example, to follow a 40/40/20 ratio for a 200lb person.
40%
Approx: 2400 cals needed to cut
Now do the math:
2400 cals 40/40/20
40% of 2400 = 960 cals need to come from Protein
40% of 2400 = 960 cals need to come from Carbs
20% of 2400 = 480 cals need to come from Fat
Now that we know where the calories need to come from, its time to figure grams.
960 divided by 4 = 240G of Protein
960 divided by 4 = 240G of Carbs
480 divided by 9 = 53G of Fat
Then divide this up by 5 to 6 meals a day add in 3-4 servings of Green fibrous veggies and your done. Be sure that most of your fat comes from EFA's (Essential Fatty Acids