A percentage is a fraction of an amount expressed as a particular number of hundredths of that amount. 百分比
noun [抽象名词] 百分比,百分率;部分,比例;利润分成,提成;<非正式>利益,好处
Only a few vegetable-origin foods have such a high percentage of protein. 只有几种来源于植物的食品含有如此高百分比的蛋白质。