Percentage of promoters minus percentage of passives Percentage of promoters minus percentage of detractors, divided by percentage of passives Percentage of promoters minus percentage of detractors Percentage of promoters The correct answer is: Percentage of promoters minus percentage of detractors.
Ease of completing a task Overall satisfaction vs. satisfaction at a particular moment Satisfaction at a particular moment vs. overall satisfaction Impact of a bug or outage The correct answer is: Overall satisfaction vs. satisfaction at a particular moment.