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

### Instruction:
 Avianna在她的生日上买了红蜡烛和蓝蜡烛的比例是5:3。如果Avianna在她的生日上有45个红蜡烛，她有多少个蓝蜡烛？


### Response:
 Avianna有5/3 * 45 = <<5/3*45=75>>75个蓝蜡烛。