Answer:
$20.55
Step-by-step explanation:
If the current price is 27% lower than the price last week, then since 100% - 27% = 73%, the price this week is 73% of last week's price.
73% of what number is 15?
73% * x = 15
0.73x = 15
x = 15/0.73
x = 20.5479...
The price was $20.55
