Don't forget that all percentages relate to the actual RPM at 100% and are not a percentage of the current RPM. Similarly, when a turbine engined helicopter requires hover torque plus 20%, you do nothave to work out 20% of the current torque figure, it's relative to 100%.
Although Chips with... is mistaken in thinking 100% RPM at flat pitch is "full power", he is right of course that FW do their check at a lower figure. Eg 1800 RPM with a 2600 red line = about 70%.
It's always interesting when a change comes out with no real explanation; maybe manufacturers could include a brief summary of reasons with ammendments.
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Another day in paradise