Final answer:
The weight loss support group is 2% heavier this week, calculated by using the formula for percentage increase which is the difference in the total weight divided by the original weight, multiplied by 100.
Step-by-step explanation:
The student is asking about the percent change in the weight of members of a weight loss support group from last week to this week. We can solve this by first finding the difference in the total weight and then calculating the percentage increase.
Last week, the total weight was 3,990 pounds and this week it is 4,069.8 pounds. So, the difference in weight is:
4,069.8 pounds - 3,990 pounds = 79.8 pounds
Next, to find the percent heavier the group is now, we use the formula for percentage change:
Percent Increase = (Difference in Weight / Original Weight) x 100
Percent Increase = (79.8 / 3,990) x 100
Percent Increase = 0.02 x 100
Percent Increase = 2%
Therefore, the weight loss support group is 2% heavier this week.