Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
A performing magician has a disappearing act where he makes a random member of his audience disappear and reappear. Unfortunately, one-tenth of the time, the audience member never reappears. However, one-fifth of the time, two people reappear instead of only one. If the magician has put on 100 performances of the act this year, how many people have reappeared?

### Response:
One-tenth of the time, no one reappears, so there have been 100 / 10 = <<100/10=10>>10 times no one has reappeared.
One-fifth of the time, two people reappear, so there have been 100 / 5 = <<100/5=20>>20 times 2 people have reappeared.
Thus, in those 20 times, 2 * 20 = <<2*20=40>>40 people have reappeared in all.
Therefore, there have been 100 - 10 - 20 = <<100-10-20=70>>70 times one person has reappeared.
Thus, there have been 70 * 1 = <<70*1=70>>70 people who have reappeared in all.
Therefore, 70 + 40 = 110 people have reappeared in all this year.
#### 110