“我去退车票了，不过我只能得到原价的80%，损失了20%”求助这句话的英文翻译

问题描述：

问题解答：

I have returned the ticket. However, I only manage to get back 80% of the original cost while losing 20%.

I went to the counter to refund the ticket.However, they could only refund me 80% of the cost, and I had to loss 20%.

I drew back the ticket, but I only could obtain the initial cost 80%,lost 20%