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QuestionMathematics

What is the decimal expansion of 7 / 22?
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Answer

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Step 1:
I'll solve this step by step using precise LaTeX formatting:

Step 2:
: Set up the division

To find the decimal expansion of $$\frac{7}{22}$$, we will perform long division.

Step 3:
: Initial Division

- Subtract 0 from 7: $$7 - 0 = 7
- First, 7 is less than 22, so we start with 0 and add a decimal point

Step 4:
: Continue Division

- $$70 - 66 = 4
- 3 \times 22 = 66

Step 5:
: Observe the Pattern

- $$40 - 22 = 18
- 1 \times 22 = 22

Step 6:
: Recognize Repeating Decimal

The digits 18 will continue to repeat, creating a repeating decimal.

Final Answer

(The bar over 318181 indicates it repeats infinitely)