Final answer:
To calculate the percent of change from 128 pounds to 155 pounds, subtract the original weight from the new weight to find the change, divide this change by the original weight, and multiply by 100% to get approximately 21.09% increase.
Explanation:
To find the percent of change when a value goes from 128 pounds to 155 pounds, follow these steps:
- First, calculate the amount of change by subtracting the original value from the new value: 155 - 128 = 27 pounds.
- Next, divide the change by the original value: 27 ÷ 128 = 0.2109375.
- Finally, to find the percent of change, multiply the result by 100%: 0.2109375 × 100% = 21.09%.
Therefore, the weight increased by approximately 21.09% when it went from 128 pounds to 155 pounds.