Final answer:
The percent increase from the original quantity of 45 to a new quantity of 90 is calculated by finding the change, dividing by the original quantity, and then converting to a percentage. Hence, the percentage increase is 100%.
Step-by-step explanation:
The question asks about the percent increase when the original quantity is 45 and the new quantity is 90. To calculate the percentage change, you need to find the change in quantity, divide it by the original quantity, and then multiply by 100 to convert it to a percentage.
The change in quantity is the new quantity minus the original quantity, which is 90 - 45 = 45. The original quantity is 45. So, you would calculate the percentage change as follows:
- Change in quantity: 90 - 45 = 45
- Divide by the original quantity: 45 / 45
- Convert to percentage: (45 / 45) x 100 = 100%
Therefore, the percentage increase from 45 to 90 is 100%.