请问英语：85折怎麼讲?你付现金还是刷卡?

85折 15 percent(discount) off discount可以省略.
你付现金还是刷卡 You pay in cash or by card?

fifteen percent off, cash or credit card?

85折
15% discount off
你付现金还是刷卡？
You pay cash or card?

15 percent off.
cash or card?

85 折 15 percent off （更常用）
15 percent discount
你付现金还是刷卡?
You want to pay in cash or card?
更简单的：cash or card?

85折扣 15% discount
付现金还是刷卡 Do you want to pay by cash or by card?

15% discount off do U pay in cash or by credit card？