What approximate value should come in place of the question mark (?) in the following questions ?
Note : (You are not expected to calculate the exact value.)
`39.7% "of 801" - 250.17 = ? - 63% "of 801"`

Options

A. 800
B. 500
C. 574
D. 760

Answer

To solve the equation \(39.7\% \text{ of } 801 - 250.17 = ? - 63\% \text{ of } 801\), we will follow these steps:

### Step 1: Approximate the percentages
We will approximate \(39.7\%\) to \(40\%\) and \(63\%\) to \(63\%\) for easier calculations.

### Step 2: Calculate \(40\%\) of \(801\)
To find \(40\%\) of \(801\):
\[ 40\% \text{ of } 801 = \frac{40}{100} \times 801 = 0.4 \times 801 \approx 320 \]

### Step 3: Calculate \(63\%\) of \(801\)
To find \(63\%\) of \(801\):
\[ 63\% \text{ of } 801 = \frac{63}{100} \times 801 = 0.63 \times 801 \approx 504 \]

### Step 4: Substitute the approximations into the equation
Now, we substitute these approximations into the original equation:
\[ 320 - 250 \approx ? - 504 \]

### Step 5: Simplify the equation
Now, we simplify the left side:
\[ 320 - 250 = 70 \]
So, we have:
\[ 70 \approx ? - 504 \]

### Step 6: Solve for the question mark (?)
To isolate \(?\), we add \(504\) to both sides:
\[ ? \approx 70 + 504 \]
\[ ? \approx 574 \]

### Final Answer
Thus, the approximate value that should come in place of the question mark (?) is:
\[ \boxed{574} \]