100000(.20)=20000$ down payment

100000-20000=$<<100000-20000=80000>>80000 remaining

80000(.30)=24000

80000-24000=<<80000-24000=56000>>56000$

# Answer

56000
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Roger bought a house for $100,000.  He was able to pay 20% down, and his parents paid off an additional 30% of the remaining balance.  How much money does Roger still owe on his house?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
56000
Roger bought a house for $100,000.  He was able to pay 20% down, and his parents paid off an additional 30% of the remaining balance.  How much money does Roger still owe on his house?
train