In most one-stage quantitative assay method for factors VIII, IX, XI, and XII, a 1:10 dilution is considered __________ percent factor activity.

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A 1:10 dilution is considered 100 percent factor activity. This means that the concentration of the factor in the diluted sample is expected to be 10 times lower than in the undiluted sample, but since the activity is proportional, the percentage of activity is the same. For example, if the undiluted sample has 100% factor activity, the diluted sample is expected to have 10% factor activity, but this still represents 100% of the factor's activity in the sample.

In Most One-Stage Quantitative Assay Method for Factors VIII, IX