Lana paid $40.8
Step-by-step explanation
you can easily solve this by using a rule of three.
Step 1
if the jacket was on sale for 15 off, then Lana paid :

85 % of the original price
Step 2
Let
x represents the value for the 85%
if

then

the proportion is the same, then

solve for x

Hence
Lana paid $40.8