After you (correctly) answered part-2, you knew the total bill . . .
(13.75 + 5%) + 15% on top of that.
(13.75) + (0.69) + (2.17) = $16.60 .
If they split the bill equally, each would pay (1/2) (16.60) = $8.30 .
But Arif wants to pay $3 more than Keisha.
Just take $1.50 away from Keisha's half (leave $6.80), and add it on to Arif's half (make it $9.80). Then their total is the same, but his share is $3 more than her share.
Raven ran the farthest on Friday because even though all mixed fractions have the same whole number which is 2, 7/10 is higher than all fractions so 2 7/10 is higher than all which makes it the answer.
