If the number of people who donate two yuan is X, the number of people who donate five yuan is (45- 1 1-X), that is, (34-X).

Because * * * donated 100 yuan, the equation can be listed as follows:

1 1 1+2 X+(34-X)5 = 100

The solution is X=27.

So 27 people donated two yuan and seven people donated five yuan.