Question

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

Answer 1

Given that,

$a$ is the predecessor of $b$,

$\Rightarrow a=b-1$

hence, the value of $a-b$,

$$\begin{gathered} \Rightarrow b-1-b \\ \Rightarrow -1 \end{gathered}$$

Hence, $-1$ is the required value.