A necklace regularly sells for $18.00. the store advertises a 15% discount. what is the sale price of the necklace in dollars

I can solve with 2 methods:

I. Because the discount is 15 % of 18 $, the price will be (100-15=85) 85 % of 18 $

18*85/100 = 15,3 $ (the sale price)

II. The discount is 15 % of 18$

15*18/100 = 2,7$ (the discount)

then I decrease it from the regularly price

18$-2,7$=15,3 $ (the sale price)

Personally I believe the first is an easier method.

I hope you understand and you can apply this in every similary problem.