Answer:
1.9 miles.
Explanation:
John jogs 2 7/10 miles to the park. Marsha jogs 4/5 miles to the park.
Convert the fractions into decimals:
2 7/10 = 2.7
4/5 = 0.8
Subtract '0.8' from '2.7':

John should jog 1.9 miles farther than Marsha.
Hope this helps.