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

### Instruction:
 一个袋子里有5颗绿色糖果，3颗蓝色糖果和4颗红色糖果。如果紫罗兰随机从袋子里取出一颗糖果，它是蓝色的可能性有多大？


### Response:
 糖果的总数是5 + 3 + 4 = <<5+3+4=12>>12颗。
一颗糖果是蓝色的概率是(3/12) * 100% = 25%。