Question

PLEASE HELP!!!
This is one question but with 3 parts; I answered 2 but I need one more.
Part one: Arif and Keisha go to a restaurant. their meal cost 13.75. The sales tax is 5%
I got $0.69.
Part two: They want to leave a 15% tip based on the bill and tax combined. I got $2.17
Now the part 3 I need help with says Arif ordered a more expensive meal than Keisha after tax and tip are figured he decides he should pay $3.00 more than Keisha. How much should he pay?

Answer 1

After you (correctly) answered part-2, you knew the total bill . . .

             (13.75 + 5%) + 15% on top of that.

             (13.75) + (0.69)  + (2.17)  =  $16.60 .

If they split the bill equally, each would pay  (1/2) (16.60) =  $8.30 .

But Arif wants to pay $3 more than Keisha.

Just take $1.50 away from Keisha's half (leave $6.80),
and add it on to Arif's half (make it $9.80).  Then their
total is the same, but his share is $3 more than her share.

                        $9.80  +  $6.80  =  $16.60

                        $ 9.80  -  $6.80  =  $ 3.00  .