Answer:
7 1/2
Explanation:
9 4/5 - 2 3/10 =
(9 + 4/5) - (2 + 3/10) =
(9 + 4/5) - 2 - 3/10 = ==> distribute the minus sign to 2 and 3/10
9 + 8/10 - 2 - 3/10 = ==> change 4/5 to 8/10 to have common denominators
9 - 2 + 8/10 - 3/10 = ==> combine like terms
7 + 5/10 = ==> simplify
7 + 1/2 = 7 1/2