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h2. How do I calculate the fixed-mass participation ratio of the model?

*Answer:* The fixed-mass participation ratio may be calculated as follows:

* [Export|kb:Export] the Joint Masses table to Excel by selecting Analysis Results > Joint Output > Joint Masses.

* Sum all [joint [masses|kb:MassJoint] masses to find the total mass.

* Square the participation factor table and divide this value by total [mass|kb:Mass].

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