To find the new workforce after an 18% increase, we calculate the increase amount and add it to the original number of employees.

Step 1: Identify the increase percentage

The company increased its workforce by 18%, meaning we need to find what 18% of 500 employees represents.

\[

\text{Increase} = 18\% \text{ of } 500 = \frac{18}{100} \times 500

\]

Step 2: Calculate the number of new employees added

\[

\text{Increase} = 0.18 \times 500 = 90 \text{ employees}

\]

Step 3: Find the total workforce in 2025

Add the increase to the original number of employees:

\[

\text{Total employees in 2025} = 500 + 90 = 590 \text{ employees}

\]

Alternatively (using multiplier method):

A 18% increase means the new total is \(100\% + 18\% = 118\%\) of the original:

\[

\text{New total} = 500 \times 1.18 = 590 \text{ employees}

\]

Answer: The company now has 590 employees (Option A)

Let number = 100. After 25% increase = 125. After 20% decrease on 125 = 125 × 0.8 = 100. Net change = 0%. Wait, recalculate: 100 → 125 → 125 × 0.8 = 100. Actually net is 0%, but let me verify: 100 × 1.25 × 0.8 = 100. Net change is 0%. Actually the answer should be B.

Let CP = 100. MP = 140. SP = 140 × 0.75 = 105. Profit = 5%.

New salary = 50,000 × 1.12 = 56,000.

30% of x = 90, so x = 300. 50% of 300 = 150.

After 15% increase: 1000 × 1.15 = 1150. After 10% decrease: 1150 × 0.9 = 1035.

80% of original = 800. Original = 800/0.8 = 1000.

Profit = 750 - 600 = 150. Profit% = (150/600) × 100 = 25%.

Increase = 100. Percentage = (100/400) × 100 = 25%.

Marks = 150 × 0.72 = 108.