The promo drove a 300% lift. What was it really worth?
Measure impactHardProblem. Merchandising ran a promotion on an item. Sales during the promo week were 300% above the prior week. They want to run it in more categories and are citing the 300% number. What do you tell them?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.