What fraction of 2 liters is 750 ml?

To find the fraction of 750 ml in 2 liters, we first convert both measurements to the same unit. Since 1 liter is equal to 1000 ml, 2 liters is equal to 2000 ml. Now, we can calculate the fraction by dividing 750 ml by 2000 ml, which equals 3/8. Therefore, 750 ml is 3/8 of 2 liters.