x is 5 times longer than y. The percentage by which y is

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x is 5 times longer than y. The percentage by which y is less than x is :

1. 50%
2. 40%
3. 80%
4. 70%

Correct Option: C

Length of Y = 1 foot
∴ Length of X = 5 feet

Required percent =			5 - 1			× 100 = 80%
			5