How is percent compaction calculated?

• A. Percent compaction = (field dry density / minimum dry density from lab) × 100
• B. Percent compaction = (field dry density / saturated density) × 100
• C. Percent compaction = (field dry density / in-situ density) × 100
• D. Percent compaction = (field dry density / maximum dry density from lab) × 100

Answer: (D)