These are the best movies percentage wise as far as more bang for the buck . Nothing against James Cameron, but i believe he has 3 of the top 4 highest grossing movies because he is always working with a fat budget
1. Paranormal Activity (Budget: $15,000; Revenue: $193 million): 645,801.51%
2. Tarnation (Budget: $218; Revenue: $1.1 million): 266,416.97%
3. Mad Max (Budget: $200,000; Revenue $99.7 million): 24,837.50%
4. Super Size Me (Budget: $65,000; Revenue: $29,529,368): 22,614.90%
5. The Blair Witch Project (Budget: $600,000; Revenue: $248 million): 20,591.67%
6. Night of the Living Dead (Budget:$114,000; Revenue: $30 million): 13,057.89%
7. Rocky (Budget: $1 million; Revenue: $225 million): 11,150.00%
8. Halloween (Budget: $325,000; Revenue: $70 million): 10,669.23%
9. American Graffiti: (Budget: $777,000; Revenue: $140 million): 8,909.01%
10. Once (Budget: $150,000; Revenue: $18 million): 6,232.39%
11. The Stewardesses (Budget: $200,000; Revenue: $25 million): 6,150.00%
12. Napoleon Dynamite (Budget: $400,000; Revenue: $46 million): 5,667.62%
13. Friday the 13th (Budget: $550,000; Revenue: $59,7 million): 5,332.24%
14. Open Water (Budget: $500,000; Revenue: $52,100,882): 5,110.09%
15. Gone with the Wind (Budget: $3.9 million; Revenue: $390 million): 4,906.73%
16. The Birth of a Nation (Budget: $110,000; Revenue: $11,000,000): 4,900.00%
17. The Big Parade (Budget: $245,000; Revenue: $22 million): 4,389.80%
18. Saw (Budget: $1.2 million; Revenue: $103 million): 4,195.68%
19. Primer (Budget: $7,000; Revenue: $565,846): 3,941.76%
20. The Evil Dead (Budget: $375,000; Revenue: $29,400,000): 3,820.00%