Eight years ago, the total of their ages was 16 less, so 49. The total of the "ratio units" of their ages was 2+5 = 7, so each represents 7 years. At that time, Cathy's age was 2*7 = 14, and Tony's age was 5*7 = 35.
Now, they are 8 years older, so their ages now are ...
Cathy is 14+8 = 22
Tony is 35+8 = 43