Question

Lauren wolf purchased address at a 30% off sale. She paid $133 for the dress. Let p represent the original price of the dress.

Answer 1

p=$133.00×.30+$133.00
39.90+$133.00
p=$172.90

Answer 2

p = original price
$133
0.70p = $133. Find p: p = --------- = $190
0.70

Here I've used 0.70 because 1.00-0.30 = 0.70. "30% off" is equivalent to "100% - 70%".