Answer :
They should leave $3.51 For a tip.
$23.40 x 0.15 = $3.51
The total amount of money they would give is $26.91; 23.40 + 3.51 = 26.91.
$23.40 x 0.15 = $3.51
The total amount of money they would give is $26.91; 23.40 + 3.51 = 26.91.