名词
中文翻译：纯度百分比
同义词：
['proportion', 'ratio', 'percentage', 'proportionate', 'proportionately']
例句：
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1. The company's sales have increased by a percentage of 20% since last year.
该公司的销售额自去年以来增加了20%。
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2.The new product has a percentage of 80% organic content.
新产品的有机含量为80%。
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3. The price is calculated based on the percentage of demand for each item.
价格是基于对每种商品需求的百分比来计算的。