15. The actual Rankine cycle has an 90.22% turbine isentropic efficiency and 81.14% pump isentropic efficiency. If in the ideal Rankine cycle, the heat input in the boiler - 903 kW, the turbine work output 394 kW, and pump work input = 17 kW, what is the actual cycle thermal efficiency if the heat input in the boiler is the same for the actual cycle? Express your answer in percent.

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