Relative change and difference

（重定向自Percent Difference）

In any quantitative science, the terms relative change and relative difference are used to compare two quantities while taking into account the "sizes" of the things being compared. The comparison is expressed as a ratio and is a unitless number. By multiplying these ratios by 100 they can be expressed as percentages so the terms percentage change, percent(age) difference, or relative percentage difference are also commonly used. The distinction between "change" and "difference" depends on whether or not one of the quantities being compared is considered a standard or reference or starting value. When this occurs, the term relative change (with respect to the reference value) is used and otherwise the term relative difference is preferred. Relative difference is often used as a quantitative indicator of quality assurance and quality control for repeated measurements where the outcomes are expected to be the same. A special case of percent change (relative change expressed as a percentage) called percent error occurs in measuring situations where the reference value is the accepted or actual value (perhaps theoretically determined) and the value being compared to it is experimentally determined (by measurement).

单词	Percent Difference
释义	Percent Difference 原声例句万物简史 The 0.1 percent difference between your genes and mine is accounted for by our Snips. 你和我的千分之一的基因差异是由我们的Snips决定的。休伯曼实验室 And we did see about a 5 to 10 percent difference in the weights of the hind limbs in terms of muscle mass. 我们确实看到后肢的肌肉质量有大约 5% 到 10% 的差异。 TED演讲（音频版） 2019年6月合集 I realized,as a councilman,to enact a structural change I wanted to see, where between the same zip codes there's a 30 percent difference in the rate of unemployment,there's a 75,000 dollars a year difference in income, that being a councilman was not going to cut it. 我意识到，作为一名议员，要实施我希望看到的结构性变化，在相同的邮政编码之间，失业率相差 30%，每年的收入相差 75, 000 美元，作为一名议员并不是要削减它。英语百科 Relative change and difference （重定向自Percent Difference） In any quantitative science, the terms relative change and relative difference are used to compare two quantities while taking into account the "sizes" of the things being compared. The comparison is expressed as a ratio and is a unitless number. By multiplying these ratios by 100 they can be expressed as percentages so the terms percentage change, percent(age) difference, or relative percentage difference are also commonly used. The distinction between "change" and "difference" depends on whether or not one of the quantities being compared is considered a standard or reference or starting value. When this occurs, the term relative change (with respect to the reference value) is used and otherwise the term relative difference is preferred. Relative difference is often used as a quantitative indicator of quality assurance and quality control for repeated measurements where the outcomes are expected to be the same. A special case of percent change (relative change expressed as a percentage) called percent error occurs in measuring situations where the reference value is the accepted or actual value (perhaps theoretically determined) and the value being compared to it is experimentally determined (by measurement).
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