The number of more miles John ran is 7/5
- Saturday = 9/10 mile
- Sunday = 2/5 mile
- Monday = 3/10 mile
Sunday + Monday = 2/5 + 3/10
= (2+3) / 10
= 5/10
= 1/2
Saturday - (Sunday + Monday)
= 9/10 - 1/2
= (9+5) / 10
= 14/10
= 7/5
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