Difficulty: Easy
Correct Answer: 23/99
Explanation:
Problem restatementExpress 0.232323… (repeating block 23) as a rational fraction.
Concept/ApproachIf x = 0.232323…, then 100x = 23.232323…; subtract x to eliminate the repeating part.
Step-by-Step calculationLet x = 0.232323…100x = 23.232323…99x = 23x = 23 / 9923/99
Verification/Alternative23/99 = (0.23)/(0.99) ≈ 0.232323…; irreducible since 23 is prime and does not divide 99.
Common pitfallsWriting 23/90 (incorrect denominator for a two-digit repetend; it must be 99).
Final Answer23/99
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