His brother. If you make the fractions have the same denominator, they'd be 9/12 and 10/12. 10/12 is equal to 5/6 making 5/6 the greater fraction therefore his brother ate the most peach.
I’m not sure but u multiply 2.5 by 3.8 to get amount she has to pay for GB. Since it free texts so 2.5 • 3.8 = $9.5 plus $15 which give $24.5 I could be wrong..