# 百分比

#### 计算一个数的百分比

```
10% of 200 | 20
25% × 200  | 50
```

#### 给一个数增加或减少百分比

```
200 + 10%   | 220
10% on 200  | 220

200 - 10%   | 180
10% off 200 | 180
```

#### 一个数相对于/增加/减少另一个数所占的百分比

```
20 is 10% of what   | 200
180 is 10% off what | 200
220 is 10% on what  | 200
```

#### 计算一个数到另一个数的百分比变化

```
50 to 75 is what %    | 50%
40 to 90 as %         | 125%

180 is what % off 200 | 10%
180 is what % on 150  | 20%

20 is what % of 200   | 10%
20 as a % of 200      | 10%

20/200 as %           | 10%
20/200 %              | 10%
```

#### 将数字和分数转换为百分比

请注意，0.5 是 50%，2 是 200%。

```
0.35 as %      | 35%
2/5 as percent | 40%
```

### 混合百分比和小数的计算

您可以对纯百分比进行计算：

```
10% + 20% | 30%
90% − 40% | 50%
```

您还可以对百分比进行小数和分数的加减运算。1.0 等于 100%。

```
30% + 0.4      | 70%
100% - 1/2     | 50%
100% + 2 + 30% | 330%
```

请注意，当将百分比乘以一个数字时，无论顺序如何，答案始终是一个数字（而不是百分比）：

```
50% × 30 | 15
30 × 50% | 15
```

## **分数**

您可以将小数或百分比转换为分数：

```
2/10 as fraction | 1/5
50% as fraction  | 1/2
```

在任何 [percentage](/zh/yu-fa-can-kao/percentages.md) 函数中，百分比也可以用分数替换：

```
2/3 of 600        | 400
50 is 1/5 of what | 250
```

## 乘数

将百分比（或分数）格式化为乘数：

```
20/5 as multiplier | 4x
```

在任何 [percentage](/zh/yu-fa-can-kao/percentages.md) 函数中，百分比也可以用乘数替换。

使用 "x"、"multiple" 或 "multiplier"：

```
50 as x of 5         | 10x
2 as multiplier of 1 | 2x
2 as multiplier on 1 | 1x
1 as x off 2         | 0.5x
```

计算一个数到另一个数的乘数变化

```
50 to 75 is what x | 1.5x
20 to 40 as x      | 2x
```


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