<p>If used to describe a percentage, "成" means 10%</p>

<p>so</p>

<p>"一成" = 10%</p>

<p>"兩成" = 20%</p>

<p>...</p>

<p>"九成" = "90%"</p>

<p>"十成" = "100%"</p>

<p>So sometimes we will say "我有十成把握" = "I'm 100% sure"</p>

CC BY-SA 4.0
2020-05-17T05:44:36.937Z
Not sure why @zyy got credited with the edit, but thanks for getting it done.
lly
CC BY-SA 4.0
2020-05-17T14:10:44.053Z
@lly Because I improved the edit.
zyy
CC BY-SA 4.0
2020-05-15T16:00:46.890Z
2020-05-17T04:53:42.423Z
2020-05-17T04:53:42.423Z
高鵬翔
<p>一成 means 10%
百分之 means %</p>

<p>Note that 成 has many meanings, and it could be confusing: </p>

<p>● 成chéng  ㄔㄥˊ
◎ 做好，做完：成功。完成。成就。成事。成交。成立。成婚。成仁（儒家主张的成就仁德）。成人之美。玉成其事。
◎ 事物发展到一定的形态或状况：成形。成性。成人。自学成才。蔚然成风。
◎ 变为：长成。变成。
◎ 可以，能行：成，就这么办。
◎ 称赞人能力强：他办事麻利，真成。
◎ 够，达到一定数量：成年累（lěi ）月。
◎ 已定的，定形的：成规。成俗。成见。成例。成竹在胸。
<strong>◎ 十分之一：增产三成。</strong>
◎ 平定，讲和：“会于稷，以成宋乱”。
◎ 姓。</p>

<p>Reference: <a href="http://xh.5156edu.com/html3/10821.html" rel="nofollow noreferrer">在线新华字典</a></p>

CC BY-SA 4.0
2020-05-16T02:16:05.267Z
2020-05-16T02:16:05.267Z
Henry Ning
<p>成 means &quot;perdec&quot; (<em>per ten</em>, a tenth).</p>
<p>百分之 means &quot;percent&quot; (<em>per hundred</em>, a hundredth).</p>
<p>千分之 means &quot;per mille&quot; (<em>per thousand</em>, a thousandth).</p>
<blockquote>
<p>三成 = three perdec = 3/10 (i.e. 30%)</p>
<p>七成 = seven perdec = 7/10 (i.e. 70%)</p>
<p>百分之三 = three percent = 3%</p>
<p>百分之七 = seven percent = 7%</p>
<p>千分之三 = three per mille = 3‰</p>
<p>千分之七 = seven per mille = 7‰</p>
</blockquote>

CC BY-SA 4.0
2021-01-17T01:10:45.230Z
2021-01-17T01:15:47.457Z
2021-01-17T01:15:47.457Z
Victor
<p>Per <a href="http://www.cantonese.sheik.co.uk/dictionary/characters/746/" rel="nofollow noreferrer">CantoDict</a>:</p>
<blockquote>
<p>成</p>
<p>...</p>
<p>[5] [n] one tenth; 10 per cent</p>
</blockquote>
<p>so it's usually used with round numbers where you could use 十分之~</p>
<blockquote>
<p><strong>一成</strong>股權 = <strong>10%</strong> equity</p>
<p>牛排烤到<strong>七成</strong>熟 = Steak grilled to <strong>70%</strong> done</p>
<p><strong>十成</strong>功力 = <strong>100%</strong> strength</p>
</blockquote>
<p>but in the following format <em>can</em> be used for exact percentages</p>
<blockquote>
<p><strong>一成三</strong>的股權 = <strong>13%</strong> of equity</p>
<p><strong>九成九</strong>是他 = <strong>99%</strong> certain it is him</p>
</blockquote>
<p>The only real place where you'll see an important difference is when you're talking about 20%. Because 成 is technically talking about tenths as a kind of thing, you figure 百分之<strong>二十</strong> but you count <strong>两</strong>成.</p>

CC BY-SA 4.0
2020-05-16T13:26:27.320Z
Edited to add some commentary to clarify the format being used in Tang's examples and to highlight the major difference between the two methods. Tang, if it gets rolled back, please restore the points in your phrasing.
lly
CC BY-SA 4.0
2020-05-15T18:50:21.917Z
2020-12-23T22:47:42.973Z
2020-12-23T22:47:42.973Z
Tang Ho
<p>Is there any difference between 成 and 百分之 when it comes to telling about percentage? I've just encountered 成 for the first time and started wondering.</p>

CC BY-SA 4.0
2020-05-17T07:03:42.557Z
Just in case the Internet is curious: 厘 is also occasionally used to mean "percent" (along with 厘米 = "centimeter").
Becky 李蓓
<word-choice>
Percent: 成 vs 百分之
# Percent: 成 vs 百分之

(Asked by: username_0 on 2020-05-15)

Is there any difference between 成 and 百分之 when it comes to telling about percentage? I've just encountered 成 for the first time and started wondering.

**Tags:** word-choice
> **Comments:**
> **username_1**: Just in case the Internet is curious: 厘 is also occasionally used to mean "percent" (along with 厘米 = "centimeter").  

---

## 4 answers

### Answer by username_7 on 2020-05-15. Score: 5 | Accepted answer

Per [CantoDict](http://www.cantonese.sheik.co.uk/dictionary/characters/746/):

> 成
>
> ...
>
> [5] [n] one tenth; 10 per cent

so it's usually used with round numbers where you could use 十分之~

> **一成**股權 = **10%** equity
>
> 牛排烤到**七成**熟 = Steak grilled to **70%** done
>
> **十成**功力 = **100%** strength

but in the following format *can* be used for exact percentages

> **一成三**的股權 = **13%** of equity
>
> **九成九**是他 = **99%** certain it is him

The only real place where you'll see an important difference is when you're talking about 20%. Because 成 is technically talking about tenths as a kind of thing, you figure 百分之**二十** but you count **两**成.

> **Comments:**
> **username_3**: Edited to add some commentary to clarify the format being used in Tang's examples and to highlight the major difference between the two methods. Tang, if it gets rolled back, please restore the points in your phrasing.  

---

### Answer by username_2 on 2020-05-15. Score: 2

If used to describe a percentage, "成" means 10%

so

"一成" = 10%

"兩成" = 20%

...

"九成" = "90%"

"十成" = "100%"

So sometimes we will say "我有十成把握" = "I'm 100% sure"

> **Comments:**
> **username_3**: Not sure why @zyy got credited with the edit, but thanks for getting it done.  
> **username_4**: @lly Because I improved the edit.  

---

### Answer by username_5 on 2020-05-16. Score: 1

一成 means 10%
百分之 means %

Note that 成 has many meanings, and it could be confusing:

● 成chéng ㄔㄥˊ
◎ 做好，做完：成功。完成。成就。成事。成交。成立。成婚。成仁（儒家主张的成就仁德）。成人之美。玉成其事。
◎ 事物发展到一定的形态或状况：成形。成性。成人。自学成才。蔚然成风。
◎ 变为：长成。变成。
◎ 可以，能行：成，就这么办。
◎ 称赞人能力强：他办事麻利，真成。
◎ 够，达到一定数量：成年累（lěi ）月。
◎ 已定的，定形的：成规。成俗。成见。成例。成竹在胸。
**◎ 十分之一：增产三成。**
◎ 平定，讲和：“会于稷，以成宋乱”。
◎ 姓。

Reference: [在线新华字典](http://xh.5156edu.com/html3/10821.html)


---

### Answer by username_6 on 2021-01-17. Score: 0

成 means "perdec" (*per ten*, a tenth).

百分之 means "percent" (*per hundred*, a hundredth).

千分之 means "per mille" (*per thousand*, a thousandth).

> 三成 = three perdec = 3/10 (i.e. 30%)
>
> 七成 = seven perdec = 7/10 (i.e. 70%)
>
> 百分之三 = three percent = 3%
>
> 百分之七 = seven percent = 7%
>
> 千分之三 = three per mille = 3‰
>
> 千分之七 = seven per mille = 7‰


---

