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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.19 . \overline{19} \newlineAnswer:

Full solution

Q. Convert the following repeating decimal to a fraction in simplest form.\newline.19 . \overline{19} \newlineAnswer:
  1. Write xx as decimal: Let xx equal the repeating decimal 0.190.19 with 1919 repeating. We can write this as:\newlinex=0.191919...x = 0.191919...
  2. Multiply by 100100: To convert the repeating decimal to a fraction, we can create an equation that isolates the repeating part. Multiply xx by 100100, since there are two digits in the repeating sequence, to shift the decimal two places to the right:\newline100x=19.191919...100x = 19.191919...
  3. Subtract xx from 100x100x: Now, subtract the original xx from 100x100x to get rid of the repeating part:\newline100xx=19.191919...0.191919...100x - x = 19.191919... - 0.191919...\newlineThis simplifies to:\newline99x=1999x = 19
  4. Divide by 9999: To find the value of xx, divide both sides of the equation by 9999:x=1999x = \frac{19}{99}
  5. Check for simplification: Now, we need to check if the fraction can be simplified. The numbers 1919 and 9999 have no common factors other than 11, so the fraction is already in its simplest form.

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