Word problem: Math for the real world

Question

Amelia purchased a new mattress when it was on sale. The sale price was 18% less than the regular price. If the sale price was $490, what was the original price? ( round your answer to the nearest dollar).

Answer 1

18% discount means 100%-18% = 82% of the original value

82% of X is 490

0.82 X = 490

82X = 49000

X = 597.560975