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Convert the following repeating decimal to a fraction in simplest form.

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Answer:

Convert the following repeating decimal to a fraction in simplest form.\newline.15 . \overline{15} \newlineAnswer:

Full solution

Q. Convert the following repeating decimal to a fraction in simplest form.\newline.15 . \overline{15} \newlineAnswer:
  1. Set up equation with xx: Let x=0.151515...x = 0.151515...\newlineTo convert the repeating decimal to a fraction, we can set up an equation using xx to represent the repeating decimal. Since the digits 1515 repeat, we will multiply xx by 100100 to shift the decimal two places to the right.
  2. Multiply by 100100: Multiplying xx by 100100, we get:\newline100x=15.151515...100x = 15.151515...\newlineNow we have two expressions: x=0.151515...x = 0.151515... and 100x=15.151515...100x = 15.151515...\newlineSubtracting the first equation from the second will help us eliminate the repeating part.
  3. Subtract equations: Subtract the first equation from the second:\newline100xx=15.151515...0.151515...100x - x = 15.151515... - 0.151515...\newline99x=1599x = 15\newlineNow we can solve for xx by dividing both sides of the equation by 9999.
  4. Solve for x: Dividing both sides by 9999, we get:\newlinex=1599x = \frac{15}{99}\newlineNow we need to simplify the fraction to its simplest form.
  5. Simplify the fraction: To simplify the fraction, we find the greatest common divisor (GCD) of 1515 and 9999. The GCD of 1515 and 9999 is 33. Dividing both the numerator and the denominator by 33, we get: x=(153)/(993)x = (\frac{15}{3}) / (\frac{99}{3}) x=533x = \frac{5}{33}

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