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description: "Practice RIGHT and LEN in a live spreadsheet: drop a 3-letter prefix from IDs of different lengths."
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> Index of every page on this site: [llms.txt](https://practiceexcelonline.com/llms.txt)

# **Drop a prefix with RIGHT and LEN**

**Premium**

Every order ID starts with a 3-letter channel code, but the numbers have different lengths. In B2, take everything after the first 3 characters with RIGHT, and use LEN(A2)-3 for how many.

B2fx

|  | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Order ID | Number |  |  |  | |
| 2 | WEB10482 |  |  |  |  | |
| 3 | APP981 |  |  |  |  | |
| 4 | WEB2210377 |  |  |  |  | |
| 5 |  |  |  |  |  | |
| 6 |  |  |  |  |  | |
| 7 |  |  |  |  |  | |
| 8 |  |  |  |  |  | |

**Premium lesson**

## **Unlock LEFT, RIGHT and MID and every other lesson**

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