∵ 100% = 360°
∴1% = 360/100 = 3.60°
(i) Part of circle due to walker’s mistake = 15 x 3.60° = 54°
(ii) Part of circle due to cycle rider’s mistake = 20 x 3.60° = 72°
(iii) Part of circle due to motor cycle rider’s mistake = 25 x 3.60° = 90°
(iv) Part of circle due to car of bus driver’s mistake = 40 x 3.60° = 144°