1. of, involving, or being in proportion. 2. (Mathematics) maths having or related by a constant ratio. n. (Mathematics) maths an unknown term in a proportion: in a/b = c/x, x is the fourth proportional.
Recommended daily calorie intakes in the US are 2,700 for men and 2,200 for women. Eating a big breakfast could help with weight reduction and maintenance. When food is eaten may matter as much as what and how many calories are eaten.
So, BMR + DA value tells you how much calories you should consume per day. If BMR + DA equals 2000 kcal per day than that means you should consume no more than 2000 kcal per day or you will start to gain weight.