1. The problem states that a quantity is 15% more in October compared to a previous value. 2. To find the new value after a 15% increase, we use the formula: $$\text{New Value} = \text{Original Value} \times \left(1 + \frac{\text{Percentage Increase}}{100}\right)$$ 3. Here, the percentage increase is 15%, so: $$\text{New Value} = \text{Original Value} \times \left(1 + \frac{15}{100}\right) = \text{Original Value} \times 1.15$$ 4. This means the value in October is 1.15 times the original value. 5. If you know the original value, multiply it by 1.15 to get the October value.