Answer: Pilot Error: 15.9%
Human Error: 3.8%
Weather: 19.3%
Mechanical Problems: 41.8%
Sabotage: 19.2%
Explanation:
260+62+315+682+313=
322+997+313=
1319+313=1632 total crashes
Pilot error: 260/1632=
0.159=
0.159*1=
0.159*100%=15.9%
Human error: 62/1632=
0.03799=
0.038=
0.038*100%=3.8%
Weather: 315/1632=
0.193=
0.193*100%=19.3%
Mechanical Problems: 682/1632=
0.41789=
0.418=41.8%
Sabotage: 313/1632=
0.191789=
0.192=19.2%