Answer:
Approximately 30 grams.
Step-by-step explanation:
Using a carbohydrate counting we can determine the number of carbohydrates in a food, usually, the number of carbohydrates is specified on the label of the food that you want to eat.
A slice of bread approximately has 15 grams of carbohydrates, so if a sandwich is made of two slices the total number of carbohydrates is 30 grams. This number can vary depending on the type of bread, there are slices of bread that has fewer carbs or a little more.