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Mathematics, 23.11.2019 01:31 pamelperezz26

Which of the following expressions could give the total amount of a $45 restaurant bill with a 15% tip added on?

everyone is saying the answer is (1.15)($45) but i do not know how this is the case. i do know that you have to do 0.15x45 but i don't know how they got 1. explain?

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