you order a sandwich that's $7.00 and a soda that is $2 you want to give the waitress and 18% gravity.

1. how much will she earn from the tip
show work please!

$1.26

Calculation:
$7.00 + $2.00 = $9.00
18% of $9.00 = 0.18 x 9.00 = $1.26