A's salary is 15% less than B's salary. B's salary is 30% less than C's salary. By how much percent approximately, is C's salary more than A's salary?

68

15% = \(\frac{3}{20}\)

Ratio of A to B's salary = 17 : 20

30% = \(\frac{3}{10}\)

Ratio of B's salary to C's = 7 : 10

Overall ratio of salary of A , B & C

= 119 : 140  : 200

Difference in salary of A & C = 200 - 119 = 81

Required percentage = \(\frac{81}{119}\) × 100 = 68.06%

= 68%  ( approx)