The value of which of the following fractions is less than twenty percent?
Aptitude
Percentage
Difficulty: Easy
Choose an option
-
A5/6
-
B2/3
-
C2/5
-
D1/4
-
E2/11
Answer
Correct Answer: 2/11
Explanation
### Concept & Logic
To compare fractions with a percentage, it is easiest to convert the percentage into a baseline fraction or convert all fractions into approximate percentages.
$$20\% = \frac{20}{100} = \frac{1}{5}$$
### Step-by-Step Solution
**Calculation:**
* Establish the baseline threshold: $20\% = \frac{1}{5} = 0.20$. We are looking for a fraction smaller than this.
* Evaluate each option:
* (a) $5/6$: Since $5$ is close to $6$, this is over $80\%$. ($\approx 83.33\%$)
* (b) $2/3$: This is a standard fraction for $66.66\%$.
* (c) $2/5$: This is exactly double $1/5$, so it equals $40\%$.
* (d) $1/4$: This is exactly $25\%$.
* (e) $2/11$: To compare $2/11$ with $1/5$, find a common numerator or convert to decimals.
* $1/5 = 2/10$
* Comparing $2/11$ and $2/10$: Since $11$ is a larger denominator than $10$, the fraction $2/11$ must be smaller than $2/10$.
* Therefore, $2/11 < 1/5$ (or $20\%$).
### Exam Strategy & Shortcut
Memorize standard fraction-to-percentage conversions for numbers $1$ through $12$.
$1/11 \approx 9.09\%$
Therefore, $2/11 \approx 18.18\%$.
Since $18.18\% < 20\%$, you can immediately identify (e) as the correct answer without manually evaluating the other simpler fractions.
### Common Pitfall
A common trap is attempting long division for every single fraction to find exact decimal values. This wastes valuable time. Use cross-multiplication or standard percentage equivalents to quickly eliminate options.
### Final Answer
**Therefore, the correct answer is 2/11.**