We are given:
Price including G.S.T. = ₹880
G.S.T. rate = 10%
Let the original price of the book (excluding G.S.T.) be \( x \).
Since the price includes G.S.T., the price with G.S.T. is:
\[
\text{Price including G.S.T.} = x + 0.10x = 1.10x
\]
Step 1: Set up the equation.
We know that the price including G.S.T. is ₹880, so:
\[
1.10x = 880
\]
Step 2: Solve for \( x \).
To find \( x \), divide both sides of the equation by 1.10:
$x = \frac{880}{1.10} = \text{Rs } 800$
Thus, the original price of the book (without G.S.T.) is ₹800.