If a and b are two integers such that a is the predecessor of b, then find the value of a_b

a-b = - 1

Step-by-step explanation:

according to the question,

a is the predecessor of b, it means a is before number of b

a and b are both integers

Let a = 9

b = 10 (as a is predecessor i. e - 1 of b)

a-b = 9-10 = > - 1

hence a-b = - 1