Solution - Long subtraction
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (1) in the ten millionths 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 (11).
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . |
Subtract the numbers in the ten millionths column from the top number:
11-9=2
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 2 |
Because the upper digit (3) in the millionths column is too small to get a positive difference, borrow 1 from the digit (8) in the next number place which becomes (7) and get (13).
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 2 |
Subtract the numbers in the millionths column from the top number:
13-7=6
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 6 | 2 |
Subtract the numbers in the hundred thousandths column from the top number:
7-0=7
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 7 | 6 | 2 |
Subtract the numbers in the ten thousandths column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 0 | 7 | 6 | 2 |
Subtract the numbers in the thousandths column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 0 | 0 | 7 | 6 | 2 |
Subtract the numbers in the hundredths column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 0 | 0 | 0 | 7 | 6 | 2 |
Subtract the numbers in the tenths column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| . | 0 | 0 | 0 | 0 | 7 | 6 | 2 |
Subtract the numbers in the ones column from the top number:
0-0=0
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths |
| 7 | 13 | ||||||||
| 3 | 11 | ||||||||
| 0 | . | 0 | 0 | 0 | 0 | 8 | 4 | 1 | |
| - | 0 | . | 0 | 0 | 0 | 0 | 0 | 7 | 9 |
| 0 | . | 0 | 0 | 0 | 0 | 7 | 6 | 2 |
The solution is: 0.0000762
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