The task is to generate the correct answer for a given math problem.

Problem: robert ' s salary was decreased by 20 % and subsequently increased by 20 % . how much percentage does he lose ?
4 %

Problem: a number x is mistakenly divided by 10 instead of being multiplied by 10 . what is the percentage error in the result ?
- 99 %

Problem: find the area of a parallelogram with base 12 cm and height 48 cm ?

576 cm 2