`3% "of" 3500 + 5% "of" 700=?% "of" 1400`

Options

A. 0.12
B. 0.15
C. 0.1
D. 0.08

Explanation

To solve the question `3% of 3500 + 5% of 700 = ?% of 1400`, we can break it down step by step.

### Step 1: Calculate 3% of 3500
To find 3% of 3500, we can use the formula:
\[ \text{Percentage} = \frac{\text{Percentage Value}}{100} \times \text{Total Value} \]
So,
\[ 3\% \text{ of } 3500 = \frac{3}{100} \times 3500 \]
Calculating this gives:
\[ = \frac{3 \times 3500}{100} = \frac{10500}{100} = 105 \]

### Step 2: Calculate 5% of 700
Now, we calculate 5% of 700 using the same formula:
\[ 5\% \text{ of } 700 = \frac{5}{100} \times 700 \]
Calculating this gives:
\[ = \frac{5 \times 700}{100} = \frac{3500}{100} = 35 \]

### Step 3: Add the results from Step 1 and Step 2
Now we add the two results together:
\[ 3\% \text{ of } 3500 + 5\% \text{ of } 700 = 105 + 35 = 140 \]

### Step 4: Set up the equation for ?% of 1400
Now we need to find what percentage of 1400 equals 140. We can set this up as:
\[ ? \% \text{ of } 1400 = 140 \]
This can be expressed mathematically as:
\[ \frac{x}{100} \times 1400 = 140 \]

### Step 5: Solve for x
To find x, we can rearrange the equation:
\[ x \times 14 = 140 \]
Dividing both sides by 14 gives:
\[ x = \frac{140}{14} = 10 \]

### Final Answer
Thus, the answer to the question is:
\[ ? = 10 \]

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