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Estimate the percentage reduction in speed of a generator with constant excitation on bus-bars to decrease its load from 470 kW to 389 kW.

Estimate the percentage reduction in speed of a generator with constant excitation on bus-bars to decrease its load from 470 kW to 389 kW. The resistance between terminals is 0.0133 ohm. The bus bar voltage is 446 V. Round your answer to 2 decimal places.

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