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Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| 4 | . | 2 | 5 | |
| - | 0 | . | 7 | 5 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
5-5=0
| Place value | ones | . | tenths | hundredths |
| 4 | . | 2 | 5 | |
| - | 0 | . | 7 | 5 |
| . | 0 |
Because the upper digit (2) in the tenths column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (12).
| Place value | ones | . | tenths | hundredths |
| 3 | 12 | |||
| 4 | . | 2 | 5 | |
| - | 0 | . | 7 | 5 |
| . | 0 |
Subtract the numbers in the tenths column from the top number:
12-7=5
| Place value | ones | . | tenths | hundredths |
| 3 | 12 | |||
| 4 | . | 2 | 5 | |
| - | 0 | . | 7 | 5 |
| . | 5 | 0 |
Subtract the numbers in the ones column from the top number:
3-0=3
| Place value | ones | . | tenths | hundredths |
| 3 | 12 | |||
| 4 | . | 2 | 5 | |
| - | 0 | . | 7 | 5 |
| 3 | . | 5 | 0 |
The solution is: 3.5
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