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Which fraction, when converted, is a repeating decimal?
(A) (3)/(8)
(B) (11)/(25)
(C) (2)/(5)
(D) (5)/(7)

Which fraction, when converted, is a repeating decimal?\newline(A) 38 \frac{3}{8} \newline(B) 1125 \frac{11}{25} \newline(C) 25 \frac{2}{5} \newline(D) 57 \frac{5}{7}

Full solution

Q. Which fraction, when converted, is a repeating decimal?\newline(A) 38 \frac{3}{8} \newline(B) 1125 \frac{11}{25} \newline(C) 25 \frac{2}{5} \newline(D) 57 \frac{5}{7}
  1. Fraction Analysis: To determine which fraction will result in a repeating decimal, we need to look at the denominator of each fraction. A fraction will have a terminating decimal if the denominator is a product of only 22's, 55's, or both, after simplification. If the denominator has prime factors other than 22 or 55, the decimal will be repeating.
  2. rac{33}{88}: Let's examine the first fraction rac{33}{88}. The denominator is 88, which is 232^3. Since the denominator has only the prime factor 22, the decimal equivalent of this fraction will be terminating.
  3. 1111/2525: Now, let's look at the second fraction 1125\frac{11}{25}. The denominator is 2525, which is 525^2. Since the denominator has only the prime factor 55, the decimal equivalent of this fraction will also be terminating.
  4. rac{22}{55}: Next, we consider the third fraction rac{22}{55}. The denominator is 55, which is a prime number itself. Since the denominator has only the prime factor 55, the decimal equivalent of this fraction will be terminating as well.
  5. rac{55}{77}: Finally, let's examine the fourth fraction rac{55}{77}. The denominator is 77, which is a prime number and not a factor of 22 or 55. Therefore, the decimal equivalent of this fraction will be repeating.

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