Question

You run the 60-yard dash in 7 and 9/20 seconds.Your friend runs it in 6 and 19/20seconds
HOW MUCH FASTER IS YOUR FRIEND'S TIME ?

Answer 1

Subtract:
7 9/20 - 6 19/20
=(7-6) + (9/20-19/20)
=1 - 1/2
=1/2

So your friend is 1/2 a second faster that you. 

Answer 2

Subtract:
7 9/20 - 6 19/20
=(7-6) + (9/20-19/20)
=1 - 1/2
=1/2

So your friend is 1/2 a second faster that you.