Solution - Long subtraction
243
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones |
| 2 | 7 | 9 | |
| 9 | |||
| - | 2 | 7 | |
2. Subtract the numbers using long subtraction method
Because the upper digit (9) in the ones column is too small to get a positive difference, borrow 1 from the digit (7) in the next number place which becomes (6) and get (19).
| Place value | hundreds | tens | ones |
| 6 | 19 | ||
| 2 | 7 | 9 | |
| 9 | |||
| - | 2 | 7 | |
Subtract the numbers in the ones column from the top number:
19-9-7=3
| Place value | hundreds | tens | ones |
| 6 | 19 | ||
| 2 | 7 | 9 | |
| 9 | |||
| - | 2 | 7 | |
| 3 |
Subtract the numbers in the tens column from the top number:
6-2=4
| Place value | hundreds | tens | ones |
| 6 | 19 | ||
| 2 | 7 | 9 | |
| 9 | |||
| - | 2 | 7 | |
| 4 | 3 |
Write 2 in the hundreds place.
| Place value | hundreds | tens | ones |
| 6 | 19 | ||
| 2 | 7 | 9 | |
| 9 | |||
| - | 2 | 7 | |
| 2 | 4 | 3 |
The solution is: 243
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