Wouldn’t the percent weight loss be -15 to both the original divided by the original?

Answers in other forums state different where the solution is

loss of weight/original weight x 100

Not sure how did that come!!

Wouldn’t the percent weight loss be -15 to both the original divided by the original?

Answers in other forums state different where the solution is

loss of weight/original weight x 100

Not sure how did that come!!

The question states to find % of Carl’s/Linda’s starting weight lost on the diet. let the starting weight of Linda be **x** ∴ starting weight of Carl would be **x+8**. now both lost 15. so percent of Carls starting weight lost on diet would be 15/x+8 * 100 and for Linda would be 15/x * 100. Hence B.