Regular price: $8.49
Discount: 5%
First note that 5% (% = per cent) means 5 parts out of 100 parts, or 5 cents out of 100 cents. So to find the decimal form of the the discount, divide 5% by 100%. That is,
5%/100% = 0.05
Therefore, to find a 5% discount on an item with an original price of $8.49 (i.e., 5% of 8.49), multiply the price of the item by the decimal form of this percentage. That is,
8.49(5%/100%) = 8.49(0.05) = 0.4245 ≈ 0.42
The sale price is thus found by subtracting the discount value from the original price:
8.49 - 8.49(5%/100%) = 8.49 - 8.49(0.05) = 8.49 - 0.4245 = 8.0655 ≈ 8.07
or, 8.49 - 0.42 = 8.07
Thus, 5% of an item regularly priced at $8.49 is $0.42. With this, the sale price of the item is $8.07.