A boy found the answer for the question "Subtract the sum of 1/4 and 1/5 from unity and express the answer in decimals" as 0.45. The percentage of error in his answer was:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. (200/11)%
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Understanding |
Application |
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Given: Subtract the sum of 1/4 and 1/5 from unity and express the answer in decimals. |
So, Answer = 1 – (1/4 + 1/5) = 1 – (9/20) = 11/20 = 0.55 |
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The boy found the answer 0.45. |
So, Required percentage = [(0.55 – 0.45)/0.55] × 100 = (200/11)% |