Question : $x$ is 5 times longer than $y$. The percentage by which $y$ is less than $x$ is:
Option 1: 50%
Option 2: 40%
Option 3: 80%
Option 4: 70%
Answer (1)
22nd Jan, 2024
Correct Answer: 80%
Solution :
Let the length of $y$ be $l$.
Then, the length of $x$ is $5l$.
Required percentage = $\frac{x-y}{x}\times 100 = \frac{5l-l}{5l}×100 = 80$%
Hence, the correct answer is 80%.
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