2015-16 NBA Regular Season Top 10 Total 3-Point Field Goals Made (source: basketball-reference leaders page via Google Translate)

1. Stephen Curry (GSW) - 402

2. Klay Thompson (GSW) - 276

3. James Harden (HOU) - 236

4. Damian Lillard (POR) - 229

5. Kyle Lowry (TOR) - 212

6. Paul George (IND) - 210

7. J.R. Smith (CLE) - 204

8. JJ Redick (LAC) - 200

9. CJ McCollum (POR) - 197

10. Wesley Matthews (DAL) - 189

Average made by those 10 players: 235.5

Difference between Curry and average: 166.5 (402 - 235.5)

Curry made 70.7% more than the average: (166.5 / 235.5) x 100 = 70.7%.