Original sentence: Of the Korean War-era massacres that the Truth and Reconciliation Commission was petitioned to investigate, 82% were perpetrated by South Korean forces, with 18% perpetrated by North Korean forces
Edited sentence: The overwhelming majority–82%–of the Korean War-era massacres that the Truth and Reconciliation Commission was petitioned to investigate were perpetrated by South Korean forces, with just 18% of the massacres being perpetrated by North Korean forces