Answer : The percentage of sugar present in milk chocolate bar is 60.00 %
Step-by-step explanation:
We are given:
Mass of milk chocolate bar = 20.00 g
Mass of sugar = 12.00 g
To calculate the percentage of sugar present in milk chocolate bar, we use the equation:

Putting values in above equation, we get:

Hence, the percentage of sugar present in milk chocolate bar is 60.00 %