To find the total grams of carbohydrates in 2.5 servings of rice, you can multiply the amount of carbohydrates in one serving by the number of servings:
\[ 44.9 , \text{grams/serving} \times 2.5 , \text{servings} = 112.25 , \text{grams} \]
Therefore, 2.5 servings of rice have 112.25 grams of carbohydrates.