Joe owes his sister Lisa $12 and his sister kelly $18 his brother David owes joe $20. Joe writes the number -12 to represent the amount he owes Lisa what number represent the other amounts given above?which person owes the most money?
For the amount he owes Lisa it would be -12, for Kelly it would be -18 and for how much David owes him +20 or just 20, since they are GIVING him the money. So, David owes the most money, since he owes $20.