1. The problem is to find 150 plus 25% of 150. 2. The formula to calculate a percentage increase is: $$\text{New value} = \text{Original value} + \left(\frac{\text{Percentage}}{100} \times \text{Original value}\right)$$ 3. Here, the original value is 150 and the percentage is 25. 4. Calculate 25% of 150: $$\frac{25}{100} \times 150 = 0.25 \times 150 = 37.5$$ 5. Add this to the original value: $$150 + 37.5 = 187.5$$ 6. So, 150 plus 25% of 150 equals 187.5.