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

### Instruction:
John's grill messes up and burns half his steak.  He eats 80% of what isn't burned.  If the steak was originally 30 ounces how much steak did he eat?

### Response:
Half the steak is burned so he has half left to eat.  Half of 30 ounces is 15 ounces.  80% of 15 ounces is 12 ounces.  So he ate 12 ounces of steak.
#### 12

