If a bar of chocolate weighs 250g what percentage of it weighs 50g?

To find what percentage 50g is of 250g, you can use the formula: (part/whole) × 100. Here, the part is 50g and the whole is 250g. So, (50g / 250g) × 100 = 20%. Therefore, 50g is 20% of the 250g chocolate bar.