To convert \( \frac{4}{15} \) to a decimal using long division, follow these steps:
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Set up the long division by dividing 4 by 15. Since 4 is less than 15, we can start the decimal by adding a decimal point and a zero to 4. This makes it 4.0.
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Now, divide 15 into 40 (since 15 cannot go into 4):
- 15 goes into 40 2 times (because \( 15 \times 2 = 30 \)).
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Write down 2 after the decimal point, and then subtract 30 from 40: \[ 40 - 30 = 10 \]
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Bring down another zero (making it 100):
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Now, divide 15 into 100:
- 15 goes into 100 6 times (because \( 15 \times 6 = 90 \)).
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Write down 6: \[ 100 - 90 = 10 \]
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Bring down another zero (making it 100 again):
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Repeat the division:
- 15 goes into 100 6 times again.
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Subtract again: \[ 100 - 90 = 10 \]
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Bring down another zero, and you see we are repeating the process over again.
By repeating these steps, we find that \( \frac{4}{15} = 0.2666...\), where the 6 repeats indefinitely.
Thus, the decimal representation of \( \frac{4}{15} \) is \( 0.2\overline{6} \).