Incorrect
Explanation
The watermelon is 99 pounds water and 1 pound other stuff. After a few hours, 98% of its weight is water, so the total weight is 50 pounds. 50 pounds - 1 pound other stuff = 49 pounds water. So 99 pounds - 49 pounds = 50 pounds water lost.
Solve this puzzle
Alex has 10 y apples. Timmy wants 20. If Alex is left with 10, what is y?
10 3 30 20