Simplification

To simplify the expression , we follow the order of operations, often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).

1. First, we perform the division .

The expression now is .

2. Next, we perform the multiplication .

The expression now is .

3. Then, we perform the addition .

The expression now is .

4. Finally, we perform the subtraction .

Thus, the simplified result of the expression is 16.

To solve the problem, we need to find the marked price of the book given the selling price after a discount.

1. Understanding the Concepts:

- Marked Price (MP): The original price before discount.
- Discount: Reduction given on the marked price.
- Selling Price (SP): Price after discount.
- Relationship:

2. Given Values:

- Selling price (SP) = Rs 240
- Discount = 20%

3. Calculate Marked Price (MP):

Final Answer:

The marked price of the book is Rs 300.