Answer:
It's 2 1/4 because you subtract the larger number by the smaller one. (7 - - 2.5 = 9.5) Then you divide by 2 (9.5 divided by 2 is 4.75). Last you subtract by the smaller number again to get the midpoint (4.75 - 2.5 = 2.25)
Step-by-step explanation: