Respuesta :

$24.50 is your original amount, and you know you have a 20% added to that. So, you can multiply the money by the percentage:

24.5 x 1.2 (we multiply it by 1.2 because we want the tip PLUS the original amount)
= 29.4

So the answer is the first choice, $29.40
After you get 1.2 you have to multiply it by 24.50 and you should get 29.50
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