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

### Instruction:
Megan is an actress. She was the lead actress in 80% of her work. In total, Megan participated in 100 plays. How many times Megan was not the lead actress?

### Response:
Megan was the lead actress in 100 * 80% = <<100*80*.01=80>>80 plays.
So Megan was not the lead actress in 100 - 80 = <<100-80=20>>20 plays.
#### 20