a dress is priced at $21.42. THe store is having a 30%-off sale. What was the original price of the dress?

Question

A dress is priced at $21.42. The store is having a 30%-off sale. What was the original price of the dress?

Answer 1

$21.42 is 70 % of the original price.

70 % of what number is $21.42 ?

0.7*P=$21.42

7P=214.2

P=30.6

P=$30.60 is the original price

30 %*30.60=9.18

$30.60-$9.18=$21.42

Answer 2

The original price, X can be found by using the formula X*30%=21.42

 

You would have to solve for X by dividing both sides by 30%.

 

Using a calculator you can type in 30% as 0.3