The expression $\frac{(0.1667)(0.8333)(0.3333)}{(0.2222)(0.6667)(0.1250)}$ is approximately equal to
Aptitude
Decimal Fraction
Difficulty: Medium
Choose an option
-
A2
-
B2.40
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C2.43
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D2.50
Answer
Correct Answer: 2.50
Explanation
### Concept & Strategy
Recognize standard recurring decimal fractions and convert them to their exact rational fractional forms ($p/q$) to simplify the entire product instantly.
### Step-by-Step Solution
* Convert each decimal value to its exact fraction equivalent:
* $0.1667 \approx \frac{1}{6}$
* $0.8333 \approx \frac{5}{6}$
* $0.3333 \approx \frac{1}{3}$
* $0.2222 \approx \frac{2}{9}$
* $0.6667 \approx \frac{2}{3}$
* $0.1250 = \frac{1}{8}$
* Rewrite the complete expression using these fractions:
$$ \text{Numerator} = \frac{1}{6} \times \frac{5}{6} \times \frac{1}{3} = \frac{5}{108} $$
$$ \text{Denominator} = \frac{2}{9} \times \frac{2}{3} \times \frac{1}{8} = \frac{4}{216} = \frac{1}{54} $$
* Divide the numerator by the denominator:
$$ \text{Value} = \frac{5}{108} \div \frac{1}{54} = \frac{5}{108} \times 54 $$
$$ = \frac{5}{2} = 2.50 $$
### Exam Strategy & Shortcut
Cancel matching items early in fractional format:
$$ \frac{\frac{1}{6} \times \frac{5}{6} \times \frac{1}{3}}{\frac{2}{9} \times \frac{2}{3} \times \frac{1}{8}} $$
The $\frac{1}{3}$ terms cancel out. Notice $\frac{2}{9} \times \frac{1}{8} = \frac{1}{36}$, and $\frac{1}{6} \times \frac{1}{6} = \frac{1}{36}$. These cancel completely, leaving just $\frac{5}{2 \times 2}$ forms or straightforward evaluation yielding $2.50$.
### Common Pitfall
Attempting long decimal multiplication or imprecise rounding approximations, which leads to floating errors near $2.40$ or $2.43$.
### Final Answer
**Therefore, the correct answer is 2.50.**