1.

1). 82%2). 84%3). 85%4). 86%

Answer»

a is 7 TIMES longer than B.

⇒ a = 7b

The percentage by which b is LESS than a = [(a – b)/a] × 100 = [(7b – b)/7b] × 100 = (6/7) × 100 ≈ 86%

∴ The percentage by which b is less than a = 86%



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