Step 1: Understanding the Concept:
The Deccan Riots of 1875 were a major peasant uprising in the Bombay Presidency against moneylenders and high revenue assessments.
Step 2: Detailed Explanation:
1. The riots began in May 1875 in Supa, Pune district, where peasants attacked shops and burnt debt bonds.
2. The British government appointed the Deccan Riots Commission to investigate the causes of the agrarian distress.
3. The commission's findings, known as the Deccan Riots Report, were formally presented to the British Parliament in 1878.
4. This eventually led to the enactment of the {Deccan Agriculturists' Relief Act of 1879} to protect peasants from the clutches of moneylenders.
Step 3: Final Answer:
The Deccan Riots Report was submitted in 1878.