(i) Percentage of penalties on dangerous driving = 20%
Percentage of penalties on driving without helmet = 45%
∴The total percentage of penalties on both the aforesaid mistakes = 20% + 45% = 65%
(ii) Percentage of penalties on driving by minor = 15%
Percentage of penalties on using mobile phone while driving = 5%
The required difference = 15% – 5% = 10%