Final answer:
The percent increase from an original quantity of 15 to a new quantity of 18 is calculated as ((18 - 15) / 15) × 100%, resulting in a 20% increase.
Step-by-step explanation:
To calculate the percent increase from an original quantity to a new quantity, you can use the following formula:
Percent Increase = ((New Quantity - Original Quantity) / Original Quantity) × 100%
Using the given numbers:
- Original Quantity = 15
- New Quantity = 18
The calculation would be:
Percent Increase = ((18 - 15) / 15) × 100% = (3 / 15) × 100% = 0.2 × 100% = 20%
Therefore, the percent increase is 20%.