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

### Instruction:
 艾米特做了12个跳跃，8个俯卧撑和20个仰卧起坐。他的锻炼中有多少百分比是俯卧撑？


### Response:
 首先找出艾米特做的总锻炼次数：12个跳跃 + 8个俯卧撑 + 20个仰卧起坐 = <<12+8+20=40>>40次锻炼
俯卧撑的百分比是俯卧撑次数 / 总锻炼次数 * 100% = 20%