Question
A man multiplied a number by 8/5 instead of 5/8, what is the percentage error in the calculation?
The correct answer is
156%
Calculation:
Let the number be 40 (LCM of 5 and 8).
The actual result should be ⇒ 40 × 5/8 = 25
But by mistake, the result obtained is ⇒ 40 × 8/5 = 64
Required percentage error ⇒ (64 − 25)/25 × 100 = (39/25) × 100 = 156%
∴ The correct option is 3.
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Important Questions from Percentage
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- A fruit seller had some apples. He sells 40% of those apples and still has 240 apples. How many apples did he originally have?
- In an election between two candidates, 75% of the voters cast their votes. 2% of the votes cast were declared invalid. A candidate got 9261 votes which were 75% of the total valid votes. The total number of voters enrolled in that election was:
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