Total number of boys studying in the college exceeds the total number of girls in the college by:

Total number of boys = 45 + 65 + 186 + 32 + 120 + 58 + 100 + 5 = 611
Total number of girls = 25 + 23 + 25 + 12 + 25 + 20 + 12 + 3 = 145
∴ Required percentage = (611 - 145/145) x 100 ≈ 321%