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# Maria and her companion had a $20 gift certificate to a restaurant. Tags: Show Tags Hide Tags Manager Joined: 03 Jun 2019 Posts: 220 Own Kudos [?]: 11680 [16] Given Kudos: 49 Most Helpful Reply GRE Forum Moderator Joined: 02 Nov 2016 Posts: 14018 Own Kudos [?]: 38713 [2] Given Kudos: 5865 GPA: 3.62 General Discussion Senior Manager Joined: 15 Jul 2018 Posts: 348 Own Kudos [?]: 478 [3] Given Kudos: 94 VP Joined: 14 Aug 2019 Posts: 1326 Own Kudos [?]: 864 [0] Given Kudos: 381 Location: Hong Kong Concentration: Strategy, Marketing GMAT 1: 650 Q49 V29 GPA: 3.81 Re: Maria and her companion had a$20 gift certificate to a restaurant. [#permalink]
Original cost of food = C

They have 20% coupon

applied :7% sales tax in total cost
addition: 18% tip in total cost

P is amount they paid=P

total paid is

C+ 0.7C +1.18C= P+20

C= P+20/1.25 (original cost)

Tip : 0.18C= 0.18(p+20)/1.25
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Re: Maria and her companion had a $20 gift certificate to a restaurant. [#permalink] Hello from the GMAT Club BumpBot! Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos). Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. Re: Maria and her companion had a$20 gift certificate to a restaurant. [#permalink]
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