[詞彙Q&A] percent,percentage ,rate ,ratio ,proportion 有什麼區別?

percent

A: percent (%)百分之(某數字) 一般都是有數字在前面的時候用 (數字+percent of sb or sth)

E.g. I only answered 20 percent of the questions correctly. You shouldn’t have copied my answers.

E.g. 85% of Eric’s paycheck goes to his wife. The other 15% goes to the government. Both do nothing for Eric.
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percentage百分率
通常在 the/a small/a large…+percentage of sb or sth 的時候用

1. Percentage被放在 the後時,用單數形動詞:
E.g. The percentage of uneducated people in this city is relatively small. Nearly everyone has a bachelor’s degree or above.

當被放在 a後時,可用動詞單數或複數形式,這由後面所跟的名詞數量而定:

E.g. A large percentage of children in the school come from single-parent families.

E.g. A large percentage of the crop has spoiled.
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rate指的是比率,比值,率等,如tax rate稅率,crime rate犯罪率等。

E.g. The crime rate in this city is rapidly increasing. There are violent crimes happening almost every day.
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ratio指的是兩個量的比值,其實是強調相比、相除的關係,但是它的兩個量必須在上下文出現。比例 (必須有確切的數字)

E.g. The ratio of students to teachers is 35:1.
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proportion是指比例關係,可代替ratio使用,但是在相比的兩個量在上下文沒有出現是必須用proportion而不能用ratio。

E.g. Only a tiny proportion of the population is infected by the H7N9 virus.

對「[詞彙Q&A] percent,percentage ,rate ,ratio ,proportion 有什麼區別?」的想法

  1. 老師好, 請問若是用 What percentage of …. 來當主詞, 其對應的動詞, 要用單數形? 還是要視 of 後的名詞來看? 謝謝. 例如: What percentage of people in the world have/has mobile devices? What percentage of buildings in California is/are two-story? What percentage of the air is oxygen? 再次謝謝老師!

    • Nearly 25% of people in the world are…

      Why is 25% of people are correct? The subject of this sentence is 25%. Fractions and percentages, like team and staff, can be either singular or plural depending on the object of the preposition following. In this case people is the object of the preposition of. We have already said that people is plural. Therefore, 25% becomes plural in meaning.

      Example: Twelve percent of the building has/have been renovated.

      The subject is twelve percent, which will be either singular or plural depending on the object of the preposition that follows. In this sentence, the object of the preposition is building, which is always singular. So the correct answer is has.

      Source: https://data.grammarbook.com/blog/singular-vs-plural/subject-and-verb-agreement-with-collective-nouns/

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