In the Grocer case study, which company achieved a larger percentage reduction in per-store emissions from Year 1 to Year 2?

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The key idea is to compare how much each company reduced its emissions on a per-store basis, using percentage change. Per-store emissions is an emissions intensity metric—values normalized by the number of stores to show efficiency independent of store count changes. To find who did better, calculate the percentage reduction for each grocer: (Year 1 per-store emissions minus Year 2 per-store emissions) divided by Year 1 per-store emissions, then multiply by 100%. The grocer with the larger percentage is the one that achieved the bigger improvement in emissions intensity. In the Grocer case, GROCER A shows a greater percentage drop from Year 1 to Year 2, meaning its energy and emissions efficiency per store improved more than GROCER B’s. This reflects stronger progress in reducing emissions on a per-store basis, rather than simply cutting total emissions or changing store counts.