Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | thousands | hundreds | tens | ones |
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
2. Subtract the numbers using long subtraction method
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (15).
| Place value | thousands | hundreds | tens | ones |
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
Subtract the numbers in the ones column from the top number:
15-7=8
| Place value | thousands | hundreds | tens | ones |
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
| 8 |
Because the upper digit (1) in the tens column is too small to get a positive difference, borrow 1 from the number to the left (20) which becomes (19) and get (11).
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 11 | ||
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
| 8 |
Subtract the numbers in the tens column from the top number:
11-4=7
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 11 | ||
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
| 7 | 8 |
Subtract the numbers in the hundreds column from the top number:
9-9=0
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 11 | ||
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
| 0 | 7 | 8 |
Subtract the numbers in the thousands column from the top number:
1-1=0
| Place value | thousands | hundreds | tens | ones |
| 1 | 9 | 11 | ||
| 1 | 15 | |||
| 2 | 0 | 2 | 5 | |
| - | 1 | 9 | 4 | 7 |
| 0 | 0 | 7 | 8 |
The solution is: 78
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