First find the total number of exercises Emmett does: 12 jumping jacks + 8 pushups + 20 situps = <<12+8+20=40>>40 exercises

Then divide the number of pushups by the total number of exercises and multiply by 100% to express the answer as a percentage: 8 pushups / 40 exercises * 100% = 20%

# Answer

20
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Emmett does 12 jumping jacks, 8 pushups, and 20 situps. What percentage of his exercises were pushups?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
20
Emmett does 12 jumping jacks, 8 pushups, and 20 situps. What percentage of his exercises were pushups?
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