20% B.40% C.60%

2. There are 100 rabbits in the cage, including 40 white rabbits, accounting for 40% of the total number of rabbits, and other rabbits are more than white rabbits (50%).

The second topic is what can't use the method of the first question? If you use the method of the first question, it should be 20%.

Because there are 40 white rabbits and 60 other rabbits, there are 20 more other rabbits than white rabbits, which is exactly 50% of white rabbits.