First find the number of tadpoles Trent released: 180 tadpoles * .75 = <<180*.75=135>>135 tadpoles

Then subtract the number he let go from the total number to find the number of tadpoles he keeps: 180 tadpoles - 135 tadpoles = <<180-135=45>>45 tadpoles

# Answer

45
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Trent caught 180 tadpoles then let 75% of them go. How many did he keep?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
45
Trent caught 180 tadpoles then let 75% of them go. How many did he keep?
train