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

### Instruction:
James and 4 of his friends volunteered to plant flowers. In 2 days, they were able to plant a total of 200 flowers. If each of them planted the same number of flowers, how many flowers did James plant in a day?

### Response:
There were 5 volunteers who planted flowers, including James.
Each day, the 5 of them planted a total of 200 / 2 = <<200/2=100>>100 flowers.
Therefore, James planted 100 / 5 = <<100/5=20>>20 flowers in a day.
#### 20