per cent 和percent 的区别?because the moon has only an

问题补充：

per cent 和percent 的区别?because the moon has only an eightieth of the earths mass,it require97 per cent less energy to travel the quarter of a million miles from the moon to earth-orbit than the 200 mi

答案：

percent 是百分率 百分比 78 percent 78% .

per cent 是两个单词 per 是“每一”的意思 cent 是“分（钱的单位）”的意思

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