In LibreOffice Calc, I have data in one column. I need to calculate the percentage of a whole column of data without filling the percentage column one by one, without writing the formula one by one when the percentage is the same, like in this case 15%. And I want to use the formula %, not multiplying by 0.15 or 0.10. Maybe this is easier than we think.

For instance, I have:

```
10 15 15% of 10 answer
20 15 15% of 20 answer
50 15 15% of 50 answer
76 15 15% of 76 answer
90 10 10% of 90 answer
100 15 15% of 100 answer
```

I hope you understand my English; it is not my first language.