1. **Stating the problem:** We are given that 2 cookies together contain 30.3 grams of sugar. We need to find the amount of sugar in 1 cookie. 2. **Formula and explanation:** Since the sugar amount is evenly divided between the 2 cookies, we use the formula for equal parts: $$\text{Amount per cookie} = \frac{\text{Total amount}}{\text{Number of cookies}}$$ 3. **Substitute the values:** $$\text{Amount per cookie} = \frac{30.3}{2}$$ 4. **Calculate:** $$\frac{30.3}{2} = 15.15$$ 5. **Interpretation:** Each cookie contains 15.15 grams of sugar. Thus, the amount of sugar used in each cookie is **15.15 grams**.