Problem:Initial sales = 100,000New sales = 1,500,000Find the percentage increase in sales. Step 1: Find the increase in salesIncrease = New sales - Initial sales1,500,000 - 100,000 = 1,400,000 Step 2: Use the percentage increase formula\text{Percentage Increase} = \left( \frac{\text{Increase}}{\text{Initial Value}} \right) \times 100\%Step 3: Calculate\frac{1,400,000}{100,000} \times 100\% = 14 \times 100\% = 1400\% Answer:The sales increased by 1400%.