`136% "of"250+?% "of" 550=670`

Options

A. 64
B. 55
C. 56
D. None of these

Explanation

To solve the equation \( 136\% \text{ of } 250 + ?\% \text{ of } 550 = 670 \), we will follow these steps:

### Step 1: Calculate \( 136\% \text{ of } 250 \)

To find \( 136\% \text{ of } 250 \), we convert the percentage to a decimal and multiply:

\[ 136\% = \frac{136}{100} = 1.36 \]

Now, multiply by 250:

\[ 1.36 \times 250 = 340 \]

### Step 2: Set up the equation

Now we substitute \( 340 \) back into the original equation:

\[ 340 + ?\% \text{ of } 550 = 670 \]

### Step 3: Isolate the \( ?\% \text{ of } 550 \)

To isolate \( ?\% \text{ of } 550 \), we subtract \( 340 \) from both sides:

\[ ?\% \text{ of } 550 = 670 - 340 \]

Calculating the right side:

\[ ?\% \text{ of } 550 = 330 \]

### Step 4: Express \( ?\% \text{ of } 550 \) in terms of a decimal

We can express \( ?\% \) as \( \frac{?}{100} \):

\[ \frac{?}{100} \times 550 = 330 \]

### Step 5: Solve for \( ? \)

To solve for \( ? \), we first multiply both sides by \( 100 \):

\[ ? \times 550 = 33000 \]

Now, divide both sides by \( 550 \):

\[ ? = \frac{33000}{550} \]

Calculating the division:

\[ ? = 60 \]

### Final Answer

Thus, the value of \( ? \) is \( 60 \).

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