To find the number of calories per serving from the yogurt, you can follow these calculations:
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Calculate the calories from the yogurt:
- Each container of yogurt has 150 calories.
- If you use 1/3 of a container, then: \[ \text{Calories from yogurt} = \frac{1}{3} \times 150 = 50 \text{ calories} \]
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Calculate the total calories per serving:
- The recipe makes 4 servings, so you need to divide the total calories from the yogurt by the number of servings: \[ \text{Calories per serving} = \frac{50 \text{ calories}}{4} = 12.5 \text{ calories} \]
The correct set of calculations gives you 12.5 calories per serving from the yogurt.