What does "a fraction of one percent" mean?
Example sentence:
She said problematic content makes up a fraction of one percent of the platform's overall videos.

Question: Does "a fraction of one percent" mean "1%" or "less than 1%"?

Question

What does "a fraction of one percent" mean?
Example sentence:    
She said problematic content makes up a fraction of one percent of the platform's overall videos.

Question: Does "a fraction of one percent" mean "1%" or "less than 1%"?

Answer

A fraction of one percent means less than one percent. For example, half of one percent means 0.5%, which is less than 1%

Answer

It is used to mean 'the tiniest amount' rather than being an actual measurement.  An amount so small it doesn't count.

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As commented below, it means less than 1% :)

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A fraction of one percent means less than one percent. For example, half of one percent means 0.5%, which is less than 1%