2-1/2 converts to 5/2
4-2/5 converts to 22/5
to give these the same denominator times 5/2 by 5 to get 25/10
and times 22/5 by 2 to get 44/10
add 25/10 and 44/10 to get 69/10
69 divided by 10 is 6.9 so the number on the side with be 6 the numerator will be 9 and the denominator will be 10
6-9/10 this is the number of miles tom has jogged