Two friends, Alejandra and Mia, agreed to split the check at a restaurant. Alejandra ordered $12 worth of food and Mia ordered $18 worth. At the end of the meal, Alejandra put her $12 contribution on the table, plus a 20% tip and Mia put her $18 contribution on the table, plus a 15% tip. The total tip left by Alejandra and Mia is equal to r/% of the total check for their table, where the "total check" amount does not include the tip. What is r?

Question

Mathematics

Lauren Camacho

22 July, 12:19

Two friends, Alejandra and Mia, agreed to split the check at a restaurant. Alejandra ordered $12 worth of food and Mia ordered $18 worth. At the end of the meal, Alejandra put her $12 contribution on the table, plus a 20% tip and Mia put her $18 contribution on the table, plus a 15% tip. The total tip left by Alejandra and Mia is equal to r/% of the total check for their table, where the "total check" amount does not include the tip. What is r?

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Wayne · Answer 1

The total check is $30.

Alejandra's tip is 20% of 12 which is $2.40

Mia's tip is 15% of 18 which is $1.80

1.8 + 2.4 = $4.20

4.20/30 = 0.14

0.14 x 100 = 14%

r = 14