Question: A pair of protective headphones reduces the sound of a jet engine from 140 dB to 110 dB. What percent of the noise is being blocked?
A: 99.90%
B: 78.60%
C: 21.40%
D: 0.10%
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Write your response with exactly 2 paragraphs, separated with the markdown divider: ***.
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