Answer:
The original price is $24.
Explanation:
original price = x (unknown)
sale price has a 30% discount applied
100% of the original price - 30% of the original price = 70% of the original price
The sale price is 70% of the original price.
sale price: 70% of x = 0.7x
sale price = $16.80
0.7x = 16.80
x = 16.80/0.7
x = 24
Answer: The original price is $24.