Carmen is 15% lighter than Mary and Thomas is 25% heavier than Carmen. Between Mary and Thomas, who is heavier? By what Percentage?
(1) Let Mary weight = 1, Carmen weight =0.85 then Thomas = 0.85*1.25=1.0625
so, Thomas is heavier. He is heavier than Mary by 6.25%
(2) Let Carmen weight = 1 then Mary = 1.15 and Thomas =1.25
so, Thomas is heavier. He is heavier than Mary by 8.7%
Please let me know why there is different anwser?
Thanks so much!!